i have never seen anything like this, I have a iphone 11 pro max that i bought in 2019.

around 3 months ago i dropped my phone and the screen broke, then a month after that i sat on it and then a pea sized dead pixel circle appeared, with a line of white pixels halfway in the screen until the dead pixel zone.

eversince then my phone has been at full storage and ive managed to delete some videos just to keep it afloat once in a while. and i've always used it as a wired hotspot for my pc.

I didnt have issues until two weeks ago, my phone has entered zombie mod, so :

• my phone keeps restarting every 8-10 min, but not a hard reset, it just resets quick and asks me to put my lock password in again when it turns on, BUT it doesnt ask me to put my simcard pin. neither would any of my apps dissapear.
• after first restart all of the phone's speakers and microphons have stopped working, volume buttons are completely disabled, and when i record a snapchat video it doesnt record any voice. the lockscreen media player volume scoll button is also gone completely. funnily enough when i connect it to a speaker via bluetooth everything works like normal, or when i use oem apple wired earpods.
• my connection keeps fading in and out, so every few mins it pretends like i have no sim card in, or no service.
• the flashlight doesnt work. the button doesnt work, the camera doesnt able the flash, neither third party flashlight apps.
• after the first reset the screen went white and started recovering data process and i let it do its thing.
• now when it resets i go to my hotspot settings and for a few seconds the password is randomized like "kpej-wo2v-xdvc-ce3d" and then all of a sudden after locking and unlocking the phone the password becomes the same as it was before "my own pass"
• the screen freezes have became extremely frequent and last triple as much.

(my software version is 15.2) yes i know, i havent updated my phone.

I've tried everything i could think of, nothing has helped.

please help me fix it.