OK. Then let's stop making criminals the victim.
If things went down as stated, and the drunk kid was followed outside and assaulted, then the UT football player is a criminal and should be charged.
I'm not sure of the criminal intent of opening a door that you think is the apartment that you just left, apologizing, and leaving. (Remember, we're arguing the assumption that the statement as reported is true.)
My son and daughter-in-law moved into an apartment complex last year. Soon after they moved in, my wife and I went to visit and knocked on the wrong door. Repeatedly. Until a scared couple of older ladies cracked the door behind a chain and asked if they could help us. I apologized profusely. They laughed and said, "You want the white kids upstairs. Seem like nice kids." I said they are and asked them to keep an eye on them for us.
Similar mistake. No harm. No foul.
I'm not sure I'd equate a drunk kid going into the wrong apartment, apologizing and leaving as "making a criminal the victim".
It's a similar mistake as is made all the time in apartment complexes. It's not breaking and entering. And it's not a peeping Tom.
It's a stupid kid.
So, if he's leaving and a UT football player actually did follow him to the landing and punch him down the stairs, committing felonious bodily injury--no matter if the drunk kid inferred he was being a dick--then it's much more of a criminal behavior than being drunk and bad with directions.