Really, if Putin hadn't invaded Ukraine, I don't think Europeans would particularly care about those problems in Russia. It only really became problematic when the order of the continent was threatened, and even then it took some serious arm-twisting to get certain members of NATO and the EU to commit to measures to do something.
That's proportionate. Equally, though, I'm sure they would be pleased to find Russia wanting to join a rules based order. Bolsonaro was just recently found to be plotting to kill his political rival in Brazil. What should we who are not Brazilians do about that?
If not, and no one else is, then there's a chance that someone like Trump might try to do something like that himself. That's what he does. He sees someone else getting away with something bad, tries to do it because he thinks he'll get an advantage, gets caught, and complains about how unfair it is that he got caught.
That, or he's just a recognition of reality: resources and being a dick get you everywhere, whether it be business, politics, international relations, or the courts. Being authoritarian didn't stop China from becoming a near-parity superpower. Europeans were more than happy to start working on Nordstream 2 and attend both the World Cup and Winter Olympics in Russia long after it became apparent that Putin and his ilk were going to return to being imperialistic autocrats. Why does it matter if the US does the same if you're willing to fall in line?