The GOP is disliked because its leaders are weak. They can't beat Trump. Trump made a living among some of the dirtiest, meanest SOB's in the world. The GOP is nothing in comparison.
That said, I don't blame them for trying to stop Trump's hostile takeover of their party. If he does, he becomes their boss and will fire their unelected component and force elected members of the GOP to play by his rules or shut up and go to the back of the room.
One more point. Trump has the money and connections to obtain all the intel he needs from the GOP. He's not going to let them get the upper hand.
Keep an eye on Roger Stone. He may have left the Trump campaign for strategic reasons.
Good points