Pretty much confirms what I suspected, Guerin has no clue.
Gave Hartman and Zuccarello similar contracts, but as of last season Zuccarello was making over three times as much. Hartman outscored Zuccarello at even strength despite less favorable usage, and Zuccarello received way more favorable PP usage, where he scored most of his points. Of course Hartman isn't going to score as many PP points.
Hartman has warts and things he should be better at, but if you're going to call out his offense, either give him the same opportunities you give Zuccarello, or call out Zuccarello too.