IOS 26 performance issues

Look, I waited for the final iOS 26 update to come out. I didn't even want to install it, but it was automatic. Anyway, after I updated, my phone froze. It crashes in EVERY game! I can't take it anymore. I bought an iPhone because of the games, but honestly, I'm seriously rethinking it...
It crashes even in simple games, like Free Fire and Roblox. My iPhone is an iPhone 15. I can't use an iPhone that crashes in any game.