I understand what you're saying but Cruz is still working to elect Hillary. He needs to get out of the way.
I think he's tone deaf Ted more than he's a liar.
Cruz has been one of the best things Trump has going. Without Cruz, it would have been one-on-one Trump v. Kasich at the end, and that would help the establishment. Also, without Cruz, it would have been the establishment picking the delegates instead of Cruz. Trump won't pay attention to that aspect of the campaign, but having delegates who oppose Amnesty matters even if Trump thinks he has enough delegates.