NOKIA 8.1 TA-1119 Overheating

I experienced overheating after android 11 update, and they dont want to let me downgrade. If this thing does not fix i would never buy again from nokia.

before i can play COD Mobile at high settings max framerate for 2 hours. Now after this fricking update, im stuttering on lowest settings because of thermal throttling on overheating.

My phone thermal while gaming is reaching 70+ degrees celcius.

What i tried so far:

Focus Mode

Reinstalling the game

Playing without silicon case

decrease brightness

factory reset