I don't think I need to "apologize" for Kullen. I do have admiration for him, mostly on the facts. Your anecdote is off. He didn't keep his job only after hiring Coady: he hired Coady when he got the job, so Coady was not forced on him as a condition for keeping his job. Assuming you put recruiting on him, not Holt's longtime assistant Dave O'Connor, there are no complaints about 1977-84 period, where UNH made the NCAAs as late as 83. Even 83, with Richmond, Douris and Mike Golden was good, though Douris left after 2, and Golden flunked out. 84 got Steve Leach and Rossetti, big gets, again with Leach leaving after 2 years. But the depth behind them really dropped off, and the recruited defensemen were awful. 85 and 86 were beyond horrible, perhaps the familiar "hard to recruit for an aged head coach."
Once he and Coady took over, being the new era of UNH hockey was very appealing to recruits. That first class of 87 was killer and got the defense righted with Dean, McIntyre and Plavsic (and even better because Amodeo would have been in 87, but couldn't get past admissions). I find it hard to believe the 1987 retirement of O'Connor and the hiring of Wilson to replace him were forced on him). He, Coady and Wilson followed with another outstanding 88 class (Mitrovic joined Amodeo, Morrow).
Not only are the names impressive, but the team went from 8 wins, to 7 during the season Kullen didn't coach, to 12, 17 and 22 wins (the first under Umile). This clearly shows the team was on a tremendous rebuild under Kullen, with his first two recruiting classes getting 22 and 22 win seasons at the end of their 4 years.