iPhone 13 Pro Max camera not working anymore

Hi! I have an iPhone 13 Pro Max, it has been well taken care of. Recently, within the past month, I have lost the ability to use my .5 camera. Which was okay, but then the camera app itself wouldn’t pull up. It would just have a black screen. When I reset my phone, it’ll come back but still be really glitchy. Sometimes, green and pink lines will be covering the screen.

I am NOT updated to iOS 26, because I’ve heard it ruins the phone??

I don’t want to get a new one at all, I want to use this one until I physically can’t anymore.

Any idea what could be the issue? Or has anyone had the same issue?