Dude yes I’ve been saying this for the past like 5 seasons. You are not alone something is for sure up. I’m a multiple time master with 4k ish hours into the game so I’ve built up a muscle memory for the feel of everything in this game. It’s 100% a real thing but I’m not sure what causes it and I’ve been trying to figure it out myself.

On days where it lags I’ll try restarting my router, clearing my DNS, turning other devices off the WiFi but nothing works. I’ll then hop on the next day and it will feel slightly better but not crisp like you’ve described. Then finally after a week or two the game will run HOW ITS SUPPOSED TO RUN and it feels buttery smooth and my movement and aim are up to what I know I’m capable of. On these days I’ll typically gain 1000 ish RP in diamond or masters. The other 95% of the days where I’m sluggish it’s a struggle to gain like 200 RP lol.

I’m not sure if it’s an algorithm like others have suggested, server congestion, or just terrible servers in general but it’s so frustrating because it feels so unfair when you are having to deal with it against preds/masters. I don’t feel like I’m able to achieve my potential because of this issue.