EU has done really well on passing big laws such as GDPR in the recent years, while the US can’t even seem to decide whether to fund their own government. Why do you think Europe is doing better than the US? One would think that since EU is more diverse it would be harder to find common ground. And there were examples of that during the Greece debt crisis. But not anymore, it seems.
The US system was functional when the two parties worked together and compromised on policy issues. it has unfortunately evolved into “ Red team good, Blue team bad” bickering as a result of the various culture war and social issues that have been overhyped by various vocal minorities. That and the indoctrination of the masses by far-right christo-fascist nationalists.