My argument is he had a lack of resources - he failed at recruiting but it was never his job to recruit JON or Tambling or Deledio. Why should he be blamed for trades and recruits? Hardwick didn't trade for Maric, Chaplin, Houli, Morris, etc - Blair Hartley did.
If Terry Wallace had a team of 4-5 full time recruiters and 4-5 part-timers and a Blair Hartley full time expert to make trades for him, then he could focus on just coaching, which he's very good at. And even if he might have the ability to make trades or draft 18yos, no one man can do everything at once or they'll perform worse at everything. That's what happened to Terry Wallace.
Because he's in charge of the team. He's the boss. It's called accountability and responsibility. He has seemingly avoided any semblance of either both when he was in the job and especially since.