As I stated you are unaware of the entire background. Every university has an obligation to itself. So certainly if UConn were given the opportunity they would have upgraded conferences. In fact they did it when they left the Yankee Conference.
What was specifically underhanded about Pitt was their handling of the BE conference negotiations with ESPN around the time that they were negotiating with the ACC.
Just prior to Cuse and Pitt leaving for the ACC, the BE was in negotiation with ESPN for an new contract. The numbers weren't great but they were a significant upgrade over the previous contract and far greater than was negotiated after Pitt and Cuse bolted.
Three schools vetoed the contract. Georgetown ( who I don't begrudge because they felt the conference should have been valued higher and they had no clue what was going to happen)
Notre Dame ( who also didn't know the unfolding of events and although I have some sour grapes about them having voting privileges despite not being fully in the conference the fault was with the other members for giving them this privilege and not Notre Dame). The third vote against the contract was Pitt who chaired the athletic committee. They were deeply engaged with the ACC at the time of the vote. They couldn't abstain because that would have revealed their move but they could have voted for the contract similarly to what Syracuse did.
In effect they destroyed the remaining teams by leaving the conference and voting against a contract upgrade essentially minimizing any leverage the conference could muster.