You can tell the game to utilize Operating System default mouse setting by opening the game, goto menu ->Options → Mouse and Keyboard → Uncheck Enable Mouse Sensitivity. If you use the Mouse Scroll but also want to disable any adjustments, you can uncheck: Enable Mouse Scroll as well. Doing both should revert the mouse fully to Operating System defaults. If you still notice any changes you can toggle: Reduce Mouse Lag to see if that has any impact.
If you utilize a gaming mouse that has software installed, you would want to make adjustments in that software or see if it has a profile for the game that has custom adjustments then disable them.