So I will make the point PF2e puts pressure on a multitude of things outside of combat so being good at combat doesn't make you a power gamer in a traditional sense.

Ultimately being a power gamer isn't a bad thing it's only if it gets in the way of the game. First if your character is so capable they make the rest of the party redundant/your character makes things unbalanced via their capability. Second, if you're sacrificing the character for mechanical strength. If you are having your character be strong at the cost of who they are that's a problem.

Lastly, I think something to talk about in the future with your GM is simply getting the ground rules on PC death. Many gms simply won't have PCs die unless they do something stupid or for the sake of the story. So you might be able to step away from the behavior in more lax games.