I know this sounds crazy, but it seems like the Nevills' family bond with PSU Wrestling goes beyond whether or not they're in the starting lineup.
Between AJ transferring, Nick being supplanted in the lineup, and Seth having another high-level recruit brought in for competition, that family has plenty of reason (speaking only from the outside) to at least end the association with the school/program, if not hold a grudge. However, there is no indication that is the case.
Not how Gavin Hoffman's Papa would have handled it