I'm not sure what you are getting at here. Trey obviously committed a foul when he tripped that kid, and yet it wasn't called by the refs. Probably because they didn't see it, but if they did see it and they didn't call it then that's just another example of a subjective call that the refs got wrong. When Trey got called for the offensive foul on the three it was obviously a subjective call, and one that literally never gets called in college basketball.
It seems like as if you want to make the argument that when a call is subjective it's OK if the refs get it wrong. And that's silly. Of course refs miss calls sometimes and of course the refs call the wrong thing sometimes. That doesn't mean that it's OK for refs to screw up a call. That just means that the human who is reffing the game made a mistake. The human who made that call against Chukwuka yesterday made a mistake. He clearly misapplied the rule. When a ref does that it's OK to say that he screwed it up, if for no other reason than he did.
Oh, and as far as what some people post about refs, let's keep in mind that there is a portion of our fanbase (and probably every other fanbase as well) that legitimately thinks that the refs, all refs, in both basketball and football, are conspiring to make bad calls against Pitt. Those people are batshit crazy, but that doesn't mean that sometimes we don't get the short end of a bad call or two. What they never recognize is that sometimes we get the "long end" of a bad call or two.