I am using s21 ultra and its lagging within 2years how its the build that the best of samsung is lagging..Apart that the main issue my power button got loose but itself and came out so i visited the service center and they said they cannot repair po...

Why i have spend so much money to buy this s21ultra worth Rs100000, is it for over heating issue without doing nothing, for laggy experience, ever samsung apps r lagging, or is it for app crash or is for laggy camera ,laggy videos after using couple ...