What's killing us is the routine shots going in on top of those rushes. What's killing us is Freddy letting in the first shot of the game or back to back goals within a minute of each-other. Those aren't on the defense, those are mental fragility. It's the same thing that happens in game 7s, he's easy to get off his game.
The things you're describing are the scenarios most goalies will let in a bulk of goals, if it's a continuous thing by the defense. You said yourself that your team's style will likely result in more odd man rushes than a more conservative team, so why would you expect Andersen's save percentages to be closer to goalies who play for teams that don't give up many odd man rushes?
And you're also making it sound like Andersen is constantly letting in these backbreakers without acknowledging the fact he's stolen you guys games where you're giving up a ridiculous amount of shots/chances. If the Leafs had lost those games I referenced against the Jets and Canucks, Leaf fans would have been beating on the "we need Andersen to make a damn save" drum instead of acknowledging how piss poor the Leafs played defensively those two nights because the Leafs ended up winning and Andersen bailed them out.
When a goalie is consistently facing the number of odd man rushes or sloppy performances in their own zone as much as Andersen does, it will also result in more "iffy" performances. If you play behind a rock solid defense, 9 times out of 10 you'll have an easy night and only have to play outstanding 1 time out of 10, it's a lot easier to do that than if you know you'll have to play behind a leaky defense and have to play outstanding 6 times out of 10 for your team to have a shot at winning.
I mean, I just think Leaf fans like to scapegoat him. If Andersen does leave, I think you'll see your new goalie get the same complaints eventually because of the way the Leafs play.