There's nothing wrong with anger as long as it is intelligently directed and focused. But this is just lashing out without any kind of strategy at all.
Don't like the leadership of the GOP? Great - then run for local party offices, or have candidates run for local, state, and federal elective offices. But the Trump movement has none of that. It's just one guy, and unless you give him a whole lot of like-minded people to work with in office, he has little hope of achieving anything more than transitory change.
I hate to generalize, but a lot of his support seems to be people who don't really understand how government actually works. They think Executive Orders are a magic bullet, that Trump can fire party officials at will if he wins the election,and that career pols in Congress are just going to whimper in acquiescence when facing a "real man" like Trump.
But that's more of an adolescent fantasy than reality.
No disagreement that anger can be a motivator. But anger as the sole source of decision making ALWAYS leads to disaster. There are no good decisions that are based solely on anger, no matter what the issue is.
But I completely agree with you that there is some fantasizing going on here, and a fundamental misunderstanding (or willful disregard) of the balance of powers intended by our Founders.
In that way, Trump's followers are no different than Obama's when they voted for him. But then when Congress didn't roll over and die, they became furious with Congress for not acquiescing to their god. I could see the same thing happening to those who revere Trump. They will hate anyone who stands in his way.
Of course this is all moot because anyone who is thinking knows that Trump will get crushed by Hillary. Other than his band of followers, he's not going to attract anyone with his vulgar, misogynistic, nasty demeanor.