The Russians are selling more to China and India since the war. The higher price of gas means in the short run they are making more money.
Yes, some sanctions might be annoying, in the way a mosquito is annoying to you, but basically nothing europe has done has really had an impact. (Most weapons have come from the US).
So while parts of what you say is true, frankly the situation is terrible for Europe, quite bad for Russia, and pretty awesome for the US
Yes, Russia makes a lot more money at the moment because the small amount of gas they still sell to EU countries is expensive enough that it nets more money.
Anybody who has been following the war a bit will notice that Russia is now seriously running out of modern weapons. By the time tanks from the early 60s show up at the front line, you can be sure something is wrong. At the moment, and due sanctions, Russia has a bit of a production problem.
Since the 2014 sanctions, Russia has a bit a problem with obtaining micro-electronics. The effects of that are also quite noticeable.
In any case. Over the summer, EU countries managed to fill their gas storage while producing enough electricity to keep most stuff running. So yes, the situation is bad for the economy and EU countries have to figure how to help people pay their energy bill, etc. But if the current situation is 'terrible' then I wonder what word has to be used for a real disaster.
It is assumed that Russia sent a warning message to EU countries not to interfere. Fortunately, most EU countries recognized that Russia was no longer a reliable supplier. And imposed sanctions, delivered weapons anyhow.
Russia thought they could threaten their most important customers. The problem Russia now has, it that there is hardly any capacity to sell gas to other countries. Building pipelines will take many years and will have to happen without western technology (I'm sure Russia would like China to own their pipelines). Or Russia has to build more LNG terminals, but that is also not ideal. And ship from western countries probably won't go there.
Of course, the downside of relying to much on Russian gas is that EU countries now have to deal with an enormous energy shortage.