Not saying I understand the dynamics of his performance and attitude, but thinking of 3 years of Diaco and then a half year of this defensive scheme would drive most players crazy. This defense gives up so much "territory" to the opponents offense that I can see how a DB would get upset. Everything is designed to make DB's look bad: no pass rush, LB's can not cover middle of field, zone gives sidelines up to receivers, DB's so far off receivers they can't recover to tackle.
I'm not buying that DB's are playing off receivers the way they are "CONTRARY TO DC COACHES INSTRUCTIONS". I would not like to go to practice or get beat up for 60 minutes if I really thought the defensive scheme being used was really stupid. Especially if the scheme was designed to hang the DB's out to get beat. Not saying there aren't "execution" issues, just that it's hard to play when the offensive set can easily overwhelm at the point of attack because a decent opposition OC/QB can see where UConn's defense is weak.
Remember this kid spent last 6 games of last year playing defense for a team that had given up and this year has spent 8 games playing for the worst defense in football. I'd have an attitude also, DL and LB's don't get hung out to dry like DB's do. I'll give him the "under 25 years old" and still immature semi-exemption.