FIX Minecraft Mouse Acceleration Sensitivity GLITCH 1.14.3 Or Higher!!! | MULTIPLE FIXES
As of 1.14 updates, specifically 1.14.3 and higher, Minecraft's mouse sensitivity and acceleration are glitched, there are multiple solutions to this that are seen in the video.
This bug has been reported to Mojang and labelled as 'FIXED', but if the problem is still persisting, this video may help.
Like if this video solved your problem. And have a wonderful day!