Agree with the "not been on vacation recently". Things have been gradually backsliding in the US, and when the change is gradual it's easier to miss. There will be a bunch of downvotes on this post, along with "then get outta here" replies, but really: just travel outside of the US and see for yourself.

Also, there is a predominant culture in the US where everyone must always think it is the best country in the world at everything, and if you question this narrative in any area you are somehow a traitor. Shaking this off requires quite a shift in perspective.

Lastly, the taxes thing is mostly false. Sit down and actually do the math. You will be likely be surprised. For one, California taxes are higher than in most of Canada (not Europe, but I have lived in both places). Do your own comparison and don't assume.