Lag Issues

Hey everyone , so i basically have a big lag issues , its making the game unplayable . Whenever i move the cursor the game stutters and laggs (weird thing is if i hold right click while i move and look around everything works fine) . I have tried disabling all the addons , and multiple other choices i found on youtube to improve the fps , but nothing seems to be working . My pc is not the problem since i have 16gb ram gaming pc , and i have the newer expansions which are working perfectly fine . Anyone has any idea what could be the problem and how to fix this ?

menu -> video -> disable "hardware cursor"

In-game video settings: Disable Hardware Cursor