The problem with those that want to leave is, unless you have a connection to the other country you want to leave to (such as dual citizenship), or have some kind of much needed professional designation, or are seeking asylum, it's just not that easy.
For a lot of folks, if they chose to move out of the states (legally), by the time they filled out the paperwork, got approved (assuming you do, and that's not easy either), and settled your affairs, Trump's second term (God forbid) would be almost over.