They and others moved out because Democrat taxation and regulation became punitive. Just because the EU is now more punitive doesn't mean the USA is the optimal place to go.
It's going to take serious Congressional action to improve America's competitiveness - and deafness to a lot of squawking from union bosses and other looters who have benefited from the collectivist agenda.
Trump removed so many overly intrusive and unnecessary regulations. Biden and Harris, on the other hand, have added thousands and thousands of pages of new regulations.