Like I said, it has its good and bad, but generally I think it's OK. I didn't say it's all good.
Now let's look at the list: 1) Concentration camps and organ harvesting: I'm not going to argue about these as I'll say you don't have true proofs and you will say I'm brainwashed, we will never agree to each other. Organ harvesting actually does happen, I can say for that, because I just read a report (in Chinese btw) a few days ago, but it was not large scale and definitely not in the ideology.
2) Suppressing free speech: Yes that's one of the bad, but TBH you can blame the government online as much as you want because so many other people are doing the same...people seldom got caught JUST because of that. For example. the protesters in HK was not even put into prison for some of their violent actions, and if that's not enough I really can't say more.
3) Questionable economic measures: Not a new thing, pretty much every government of the world is doing the same thing since like...beginning of civilization?
4) Strongarming other independent countries: Not a new thing, pretty much every government of the world is doing the same thing since like...beginning of civilization? Just the real world, more the reason that people should work hard instead of dreaming about vacations to fight off these strongarmings. TBH with the economic strength of China it is quite peaceful...
In short, citizens are indeed able to express their unhappy with the government, and a lot of people (in the mainland) protest, too. The weird thing about my western friends is that they seem to be pretty scared about China, and I honestly can't tell why...
But the concentration camps for Uyghers are well-documented, and they really can't be grouped with the organ donation claims. See https://en.wikipedia.org/wiki/Xinjiang_re-education_camps .
I'm neither educated nor motivated enough to argue with most of this. But preventing China from punishing HK people according to China's laws is the _entire point_ of the protests, is it not?
I would also argue that China has been strongarming other countries in excess to any other nation except for the USA in recent decades. China is the only country that uses face and "people's feelings" as distinct political instruments. But this is also not my main point and also not the point of the OP.
For the other things, let me make two points. First, your assertion that this also happens in other countries does not make it okay. This is a fallacy often used. What I am saying is that the rate and fashion to how these things are reporting on, protested against, and dealt with in other countries, is much different than in China. It is a fact that many bad things happen in Western countries right this moment. But the people arrested or disappearing for pointing these things out is pretty much zero. I was just on business in the US, and watching MSNBC and Fox News at the same time, it's clear that there is a huge range for opinions on literally all political and economic actions and actors - and they are strongly voiced. Indeed the US has a strong culture of government distrust and conspiracy theorists that simply would not exist in China. In (most of) the EU, measures done by the CCP could never even be implemented at all, as neither the political force. executive capabilities, nor the acceptance in the population exists in such a way. But even if these things would be implemented, you could always find a country that does things better, treats people better and is more humane. So I think this framing is really useless, whether we argue about China, the USA or Sweden.
Second, why are people afraid of China? We are afraid because we do not want the Chinese model to succeed. As much as it helped pull people from poverty, it has created and cemented an incredibly wealthy and powerful upper class, and we are rightfully worried that our own elites take some hints. We are not scared of Chinese soldiers marching into our country, but if China would develop similar cultural hegemony as the US has currently, our world would be be much worse (at least for me, as I am a minority). China violates very basic tenets of human rights that we believe enable us to live freely. China also implements the mechanisms necessary to push strongly the will of the majority on the minority - or to be more precise, the will of someone on anyone. Again, I only need to mention the very real plight of Muslims in China - "uniformize or perish" - for you to hopefully see this point. This very same thing could happen easily elsewhere, and indeed we have seen it happen in the past. You may, for example, want to google the term "Stasi" if you have the time.
Its a tiresome trope, but people valuing a free society will always be deadly afraid that living with a boot on their necks is an actual viable political and economic model, because if it is, what's keeping history from swinging exactly that way? Free and tolerant societies are the exception in history and we - especially minorities in any sense - would like that to change! Is it a pipe dream? Maybe - but that's exactly where this fear comes from. It is probably difficult to understand this point if you belong to both a local and (eventually) globally dominant grouping.
Finally, as to your first sentence: I think it is ALSO easy to propose many actionable and easy measures to make things better in China, for example, stop doing the things we agree are "bad". And many countries or governments are not doing these things. So I ask again, why can you not imagine anything better? And furthermore, where would we be if we can not imagine anything better?
It is easy to see all the good things that happened in China in the last decades, and see the things that work. But I can very easily imagine a better government in China, much like I can do so for the US and in EU countries.
The CCP is running literal concentration camps, is suppressing free speech, using (possibly) questionable economic measures, strongarming other independent countries, censoring and even harvesting organs of prisoners for profit (probably for political elites). And most of those things on a scale previously unimaginable. Furthermore, one might argue (and I am not saying this is black and white) that the process of raising people out of poverty has as much to do with technical progress, foreign trade and China's geographical and demographic makeup, as it has to do with actual policy (and one could therefore imagine even better outcomes!)
I think it is indeed very easy to imagine things going better in China!
That's the entire point, I think. Citizens should be willing and able to be unhappy with their governments, and be able to express this without disappearing. That you can not imagine anyone doing better in China is what the OP was talking about.
Edit: Just to make this clear, I do not want a discussion on the merits of the CCPs policies - everyone can have their own opinion on that - much like for any other country. But the worry is the well rehearsed narrative that China is somehow unique and requires, basically, an iron fist rule. This I have seen many times in discussions with Chinese - saying that all these criticisms may be good and well for other countries, but not for China. And this in the end amounts to unwillingness to question the CCP in any way. And that, I think, is not good.