Ever since about a month ago I've had really bad mouse delay in Minecraft. I haven't changed any settings, installed any programs, nothing. The issue seems to be only Minecraft based, as all other games run fine with the mouse I have. I use a wireless mouse but I've tried to use a wired mouse to see if that helps and it still doesent. The problem only exist in game while moving around as when I go into my inventory and use my curser there seems to be no mouse delay at all. The problem still exist when I use Badlion/the normal launcher, I've updated my computer, changed settings according to other peoples mouse delay problems, changed servers, changed versions, but nothing seems to work.
It would be helpful if you could post a short video to show the effect. I can speculate that you may have turned on the
Cinematic camera somehow. Check in your
Controls settings which key toggles
Cinematic camera. If it is not assigned, you can assign and unused key. Then return to game and press the key.