Her dad signed a contract that all but guaranteed he's never coming back. (It would've been nice to grab him after Barnes retired). That action broke the spell for Vol fans still holding on. Now, he's just another former coach. One we still have some feels for but on game day an absolute enemy.
The fans that were rude to her probably had no idea who she was beyond thinking she was some Auburn fan. I'm sorry but rudeness happens every game, especially when a team's ritual is to disrespect every other team's home court. That sets a tone and no amount of apologetics for why and how they do it changes that. She got some of the pushback from that and didn't like it.