Wierd FPS issues in season 19 ONLY

Idk what Is happening but since I updated to season 19 every game of mine has been having fps issues !
I never had very high fps but I could maintain at least 130 fps even with CPU bottle neck
but now I can only get up to 80 in the middle of matches and im not understanding the reason behind It
I’ve put my game in the low of lows in graphical performance and It still didn’t help me at all
I anyone having this issue or did my pc just gave up completely LOL