This is a "Pathfinder 2e isn't for you" moment. You're supposed to be fans of one another and take pleasure in the team's efficiency and efficacy. If you can't imagine sharing the spotlight with your team this isn't for you. It's not a feels bad to succeed together.

I offered advice that a hand crossbow was a worthy investment for a caster. I was basically browbeaten out of the reddit discord. Meanwhile I'm doing it on a witch with my familiar with independent and manual dexterity reloading it for me.

The weird pervasiveness of White Room Theorycrating convincing people that a class has poor DPR when it can just casually throw 12-24 d6 damage with a fairly low level spell then strike with what is in the context of a followup attack more accurate than most martials should be studied.

Basic misunderstanding. The invention of the gun wasn't motivated by power but arming the everymen with easy to use weaponry. If anything, fireball increases the impetus.