Huskers have a lot of critics out there. Some are fair weather fans, some are lifelong fans, others aren't even fans. But to a player on the team, they all sing the same beat. "Your a terrible athlete and don't deserve to be on the team."
Though it may not be in those exact words, that's normally how some players will take it. Some players will stick it out, others will leave to find a fresh start in a less hostile environment.
Sounds to me TA wants to block out the outside noise from critics about him, and he has the support of the team and coaches to stay and improve at Nebraska.