Agree, NC1, the really bright kids absorb advice, process it, to make informed decisions.
I suspect OP has lots in his favor. But the process for getting an admit is more than he realized. Now he has a wonderful chance to learn over 4 years, not direct complaints against others.
It’s his choice whether he proceeds grudgingly or sees it as a fresh start. Cream rises. Bitterness isn’t a valuable life skill. Won’t win opportunities or jobs or build the cushions we all need in life- friendships, confidence, caring.
Attitude matters.