Hello Galaxygod7423 (Minecraft Username),
Welcome to Microsoft Q&A forum.
Based on the description, this doesn't seem like a settings issue, but instead a regression issue regarding to a new update or change. First of all, can you please check the GPU driver to see if it is fully up to date?
Before we proceed further, please help me do a little check. Can you please open the Performance tab of Task Manager and let me know the GPU performance when Vibrant Visuals is ON?
I'm waiting for your reply.