Not really. There are other reasons people would support Trump
Aside from the reasons he mentioned, the main reason people support Trump is paranoia and conspiracy about some Obama (and now Clinton) agenda to turn America into some third world Banana Republic.
These people talking about how broken America is, how terrible life is there, the dead American dream, America getting fucked this way and that by everyone else.... it's utter nonsense and makes them sound like imbeciles.
Is America perfect? No. But Trump and his shills need to shut the fuck up with this nonsense that America is in the shitter. The vast majority of the world would love to live in this shitter.
- - - Updated - - -
http://www.factcheck.org/2016/04/obamas-numbers-april-2016-update/
Under Obama the trade deficit has gone down, illegal immigrants have gone down, jobs have been created, unemployment has dropped below historical norm, stock market has improved, etc.
America has its problems but it's lunacy to suggest the country is in some kind of disastrous state.