Unplayable Lag

[MasterXC1]

I will be clear that I am stuttering extreme, fps drops  and ping stays stable for some time then spikes to 500 + , i tried using all servers closest to me and also  tried switching dns , deleted temp. files , Tried moving router close to pc and switched to ethernet no difference.

Pc Specs : 

IT IS A PREBUILT Hp Pc

i7 12gen ,  rtx 3060 ti 8gb , SSD 1 TB , 16 gb Ram 

One more thing , i downgraded to windows 10 its way stable than windows 11 , tried using ultimate performance mode