Any solutions to fix a wobbly mouse?

I decided to start up CF for the first time in ages, and with a new mouse this time. I used to play with some kind of default office mouse without any customizable settings which always worked fine.

However right now im using a corsair harpoon on 500 dpi which makes my crossair go up and down in waves when I aim from left to right and vice versa. Its unplayable.
Does anyone know some kind of quickfix I can try? This isnt happening in any other games. Much appreciated.

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