Employment law varies from state to state. It sucks where I am (for the employee), though. And nobody should have anything to do with the American health care / insurance system. The care itself, though, is second to none if you're covered or if you can afford it.
Vacation time and maternity / paternity leave are awful, although I negotiated 4 weeks holiday.
I'm not going cheerlead for the U.S. being the greatest nation on the planet. Nor would I agree that it is the worst. Some advantages are far greater affordability (except in the obvious places), incredible and immensely varied natural beauty, more space, a can-do attitude that is good for me and a number of intangibles. We live in a friendly and open-minded city, and there is less petty crime than we had back in England. More shootings but less petty crime : )
If I had the opportunity I would happily do as you intend and head for Germany or France or the Netherlands or Denmark.