“The rules” like they were given by Jesus Christ from Mount Olympus or something like that.
If a populist reformer complains about non-populist processes... maybe he’s being SINCERE? ...
But he’s not complaining when that process benefits him, so definitely not sincere. Now if Trump were to say he’s releasing his delegates that he got an “extra” for being the front runner (like when he gets 100% delegates even though 60% of the people didn’t vote for him in a state—He should release 60% of his delegates in that example). If he does that THEN he is being sincere.
He only complains when he loses. I didn't hear Trump complain about Nevada. Same system. Different result. So no, he isn't being sincere.
Trump could show me quite a lot if he got down in the trenches and began reforming the GOP from the bottom up like Ted Cruz is doing. But then I don't see Trump doing much of anything besides speaking at rallies. It kind of reminds me of the lead-from-behind style of another politician who had big rallies.