How do I fix the y-axis sensitivity?

I've tried many fixes. The closet I got was with a working fix, but my game settings would reset after every new game (which meant doing all controls, sensitivty etc again, at the start of the run)

I refuse to beleive that people run this game as is. It is near impossible to do any aiming vertically. One slight movement from my mouse up has tommy looking at the sky.

Which mouse are you using?

CENTROPHORUS M601.

It's only a cheap "gaming mouse".

The fixes available aren't allowed in speedrunning unfortunately. The best thing you can do as mentioned in this thread (https://www.speedrun.com/gtavc/thread/mintr) is to change your mouse and game sensitivity until you find a happy medium.

I put the windows moust sensititivty on 2 and that made it a bit better.