I wrist aim and use 0.42 @ 1200DPI. I can’t use my arm that well due to a physical disability. I really want to get good at this game but most people tend to use low sens, is using a higher sens futile?

I started the game with an omen who was lagging hard. He wasn't able to control his movement, he lag walked to one side constantly. We said he should leave so we can remake in round 2. Because of his lag he couldn't hear us / leave the game...