Horrible fps with good pc, help!

so i am having an issue with overwatch that i have never encountered before. my pc specs
GTX 970
i7-6700k
16GB ram
but for some reason, my game is constantly experiencing super low fps. Before, when the game worked, i’d get around 180-200fps, but now I get about 10-30 fps. the weird thing is that when I die and I see the kill cam, my FPS jumps right back up to what it normally would be (180-200fps). I have tried uninstalling but nothing worked. May I state, this all started happening after i just recently factory reset my pc.

they screw up with the CC patch, consoles specially, im on a Gtx 960 and play in ULTRA LOW and im getting constant and painfully drops on the fps

Your issue sounds like this one from the sticky threads: