You realize if there were bad feelings involved, his dad would still have said the same stuff, right?
You don't publicly badmouth a school you're departing.
Well that's simply not true....could there be bad feelings? Of Course. Could they have chosen not to air those feelings? Of course. Could they have chosen to air those feelings? Absolutely. In this day and age that is certainly not even unusual anymore. They could have even chosen just a "no comment" etc....but they were actually complimentary in nature.
A coach, being a professional who is paid millions of dollars, would be much less likely to make negative comments....but not necessarily a player. The player or their parent could just as easily say nothing. In Isaiah's typical way, that's what I would have thought. He was usually a very quite guy and revealed very little in interviews just because he seemed quiet by nature.