You can leave! Nothing is stopping you from staying in the US. Particularly if you're on this website, you probably have talents other countries would like to acquire. The fact that you haven't says you don't believe what you say.
Suffice it to say, constructive criticism is vital for democratic improvement.
That's a weird conclusion. For me, it's rather "The USA has its flaws (for me - healthcare and higher education financing above all) so we as a society should focus on fixing these problems". Killing people or leaving the country are not solutions, they are are an equivalent of short Twitter replies on a nuanced subject.
- You