My Game is stuttering with 200-150 fps to 30-40 fps

So a few days ago I wanted to play some ranked in LoL only to find out that my game was stuttering like crazy, but my ping was low and my graphics card is up to date in drivers and can run games that are far more graphically advanced than league.

After the Game I did some test to see if other games were like this, so I tried to run some games that were similar (graphics wise) to league such as batterite, to my surprise the game ran smoothly at its max fps of 60. So then I tried to run a game with higher graphics than the other two which was dota 2, I was able to run this game at a high rate of 150fps on all high settings. This told me that the only game that was doing this was League of Legends for some odd reason.

Once I figured out that it was only a problem with league I decided to delete all overlays to the game because I figured maybe that was causing the stuttering. So i deleted Overwolf (op.gg ap), and got ride of my twitch and discord overlays to the game, yet the problem was still occurring. I even deleted all malware on my computer and the problem was still happening. I even deleted my GPU drivers completely with the program DDU and deleting it on device manager allowing my to install a fresh driver but the problem was still there.

After all of this non sense and just so many other things that I've done that are too long to explain, I've come to the conclusion that something is wrong with the recent update for LoL. If any of you know a solution please tell me, idk what else to do around my house (its not any LoL settings, I've tried all of them).

Problem: When i'm in game I get the highest frame rate of around 200, but in team fights or even when moving around with just minions near me etc, i get these large frame drops of around where my fps goes from 200-150 to 30-40 causing stuttering in game, no background programs are running when this happens, and I don't have any other tabs open.