For me the time to consider pulling him is at the end of the 1st period. You could see he wasn't seeing the puck that well, he was batting at it. I don't know if goalies sometimes play their way out of that, but I say "uh-oh" when I see it.
Even then, I wouldn't have.
The only way I pull my Vezina winning goalie after one period is if he's godawful terrible, or if the game is so out of reach that it's a lost cause. 3-0 isn't at that level, and he wasn't that bad.
The first goal was a goalmouth scramble -- chaos. Not really much he could have done. The third one was after he made a tough save on a high riser through traffic, and no one could bother to clear out the crease and get to a rebound. Not his fault. The only one I could have faulted him on was the second goal, but even that one was off a quick turnover, and was a great shot by a wide open guy in the slot. That's one where he could have "done better," but hardly a bad goal.
There's a lot of people (not including you when I say this) that think if Bobrovsky isn't playing spectacular, then he's terrible. We expect a lot because he's an elite goalie, but there's still plenty of real estate between playing great and "deserving to be yanked." I think a goaltender of his caliber deserves a chance to pull out of it unless, like I said, it's just so bad that there's no coming back.
So if you're not going to pull him after that period, and I don't think Torts should have, it would have made even less sense after the second period. And by the time it got completely away, there wasn't any point.