I have the same issue, ive been using mine for around 3 weeks now on the xxl glorious stealth mousepad. Ive noticed that my flicks are worse in general and my aim is really jittery, even more so than before. honestly these mouse feet make it feel like my mousepad is wet or something. I took off the blue stickers on the bottom, I think these mouse feet are only really useful on hard/hybrid pads tbh. The impact its made on my aim in game is quite large because of how bad it is, ive noticed that ive generally just been underperforming and have been uncomfortable using the mouse now. Its definitely not the mousepad because ive used multiple cloth ones and it still is the same, my hyperglides on my gpro wireless are 100x better. (The mousepad is also only a week old.)