I believe Trump was well aware early on how the "system" worked is why he was threatening early on a third party split "if they the GOP Establishment wasn't fair to him". The people throwing around this rhetoric that he doesn't even understand the "system" seem to be "conveniently" forget this point. The problem is the power the GOP has to manipulate "their system" to serve themselves rather than the people.
Maybe Trump knew and chose not to act but why, then, would a state party be obliged to kowtow to Trump who never showed up? Should the GOP have given Iowa to Trump just to be fair?