You're just not going to win a game with a save percentage below .910%. You can't salvage his performances in those final 3 games because they weren't that good. You can play "if" game all you want but what if he just made 1 more save? See what I mean?
Toronto Maple Leafs at Montreal Canadiens Box Score — May 29, 2021 | Hockey-Reference.com
^^Game 6 his save% is .903%, not .935. Do you really believe his weak short side goal to Perry in game 6 was a good goal to give up? Even the OT goal was weak, a shot from the top of the circle with no one blocking his view and it goes in. Give a way or not, he has to make that save. He blew those games, that doesn't mean he should never play again, but as I said, games 2-4 do not override what he did in 5-7. We lost the series, with better goaltending we probably would have won.
And just for completionists sake. Game 1-.933 %(Price .972%) Game 2 - .957 % , Game 3 - .966 % , Game 4 - 1.00 %. You'll notice a trend here
Every year, and every playoff series is different. The Washington Capitals went with Brayden Holtby for 9 years. They routinely got eliminated from the second round and even missed the playoffs at one point . I know what you're going to say, they got past the 1st round, yes that is correct but losing in the second round and in the first , is hardly all that different, you lost, you just played a week longer. It took The Capitals with Holtby 6 years to win a cup . My point in all this is, it takes time to win and it takes a lot of failures before becoming successful . If you don't like the Capitals comparison, go look at St.Louis, they had their troubles getting out of the first round, and similar to Washington, they missed the playoffs and won a cup the following year. Oddly enough, Washington, Pittsburgh, St.Louis and LA have either lost in the first round, or out missed the playoffs entirely since their cup wins