For every anecdote here about a (very) bad experience with US immigration policy, there are 1000s daily that go on fine. It is a very large complex system that has issues, but for the majority it is working.

Find the specific issues and fix them.

Counter Anecdote: My wife won the Diversity Immigrant Visa Program, aka Green Card lottery. Came here with close to nothing and not speaking more than a sentence or two of English.