Watching the games, you can see the Leafs largely dominating play in those games, and getting much better and more chances, and even when not playing to their highest potential, still outperforming their opponent. Blaming it on goalies is actually not easy, because goals skew the casual fan's perception, and even when it's undeniably attributable to goaltending, the majority of this board refuses to acknowledge it, and blames the skaters and whatever narrative they like.
Simple fact is, when the Leafs have gotten a SV% over 0.900 (which is still below league average, for the record), the Leafs are 7-0-1 against teams with a record of 0.500 or below.
Every single loss to a 0.500 or below team was a 1 goal game. We average 3 goals for and an 0.868 SV% in those losses.