It’s the framerate jumping around that causes it. A consistent 30fps feels better than 30, 50, 30, 60, 45, etc. Many games will have a frame cap feature, which is helpful here. Cap the game off at whatever you can consistently hit in the game that your monitor can display. If you have a 60hz monitor, put the cap at 60.

Also, many games add motion blur, AI generated frames, and other things that really just fuck up everything. You can normally turn those off, but you have to know to go do it.

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If you are on console, good fucking luck. Developers rarely include such options on console releases.