As for the other party that fits this description they're their own worst enemy, as they're an amalgamation of groups which don't really have common interests aside from a few talking points.
All it takes is another term of pain, and they'll be back.
Case in point, America. A former president who by all counts should have lost the election a year ago, was literally begging on Truth Social for donations, facing numerous criminal trials and convictions, just retook the hot seat.
I've met their voter base. The young, educated, city-dwelling part.
Of course they'll be back, but like every political movement based on cult of personality, they have no coherent plan what to do should Kaczyński die/retire, aside from infighting. Arguably the vultures started circling already. The MAGA party will face the same predicament once their leader inevitably leaves the stage.
My take is that since both Kaczyński and Trump haven't appointed a successor, their political projects will die with them. Their opponents need only to survive until that happens.
I so wish that you are right. I am afraid you are not though. Trump is a symptom of the growing discontent in the society. If not Trump, it would be Bernie or someone else. But the tinderbox is there. Someone just needs to take a match to that.
Also, here in The Netherlands the yellow vests were mostly conspiracy theorists who would pull something to protest against out of thin air. That movement died down pretty quickly.
Protests here are almost always against (perceived) government overreach. In most countries even being able to protest is considered a luxury. That's why you don't see that many in the US.
But there are a lot of other factors in the problem and making it an economic issue really obscures some of the more important factors.
Intellectual laziness, idle brains, idle hands, toxic memes and bad actors making bad use of them.
When we look at magical thinking as one of those light schizotypical behaviors large portions of the population exhibit these symptoms.
They drink from the cup of nonsense to excess.
There should always be room for drinking from the cup of nonsense but too much and its difficult to be useful to yourself and your family.
Probably it is time for you to learn the plight of fellow Europeans then. The society is stewing for quite some time now, for example https://en.wikipedia.org/wiki/Yellow_vests_protests
The symbol has become "a unifying thread and call to arms" as yellow vests are common and inexpensive, easy to wear over any clothing, are associated with working-class industries, highly noticeable, and widely understood as a distress signal.
Rise of far right parties across Italy, Germany, Hungary, Poland, France and many other countries is another clear signal that EU's quality of life may not be great for everyone there.