Hey @Qwenteen74
Sorry to hear that you've been experiencing some FPS issues with your game.
Thank you for providing all the steps you already tried, I appreciate that.
To clarify, can I ask if these stuttering/input lags have happened since you purchased the game or did they appear after a particular time/any change to your setup or a new update?
I recommend, if you haven't already, making sure both the game and the launcher are installed on your C hard drive, so that we can rule this out as a potential issue.
Thanks!