Isn't the bottom 20% in the US is either unemployed, or working 60+ hours at 3 part time jobs just keep a roof overhead in a not great neighborhood, no vacations, kids at an underfunded school? Probably not much if any health insurance either?
I would say there is no comparison between the top half income earners in the countries you listed vs the bottom 20% in the US?
The family in the EU even at just the average income, is living pretty well compared to that, no worries if junior breaks his arm, and he can go to a good university almost for free if he earns his spot. They probably only have one small vehicle, but they aren't spending 10 hrs a week in it either. They have 4-5 weeks off paid vacation.
I think the US and Canada are great to live in, if you are in the top third income, just like everywhere, but probably not the best at the lower third compared to the EU.