Damn. You might be a psycho, but I like the scientific temperament.
Interesting! Lower clock speeds would only impact framerate. So the increased bluriness must therefore be dependent on the framerate or frame-to-frame latency, at least in part, no? What happens when you set an fps limit? I seem to recall hearing somewhere that a fps limit lowers input lag compared to just an unlocked framerate.
Not to mention that even if you can hit, say, 450 fps on valorant. A sudden dip from 450 to 300 fps can still be jarring. Assuming it takes someone 1/10th of a second to peek (probably not realistic idk), with 450 fps, you would get 45 frames to see them, but with at 300 fps, you would only get 30 frames. That kind of fluctuation will be bad for your muscle memory and take away your ability to reliably track shots.
You might just be in an extreme minority of people with high sensitivity to framerates. That might explain why your muscle memory can't adjust as well as others. I recall a LTT video from a while back where they made people used to a 60hz moniter try out a high refresh rate one, and many of them either did not improve or did worse. At least at first. Perhaps you should be aiming to get the highest absolutely locked fps with zero dips that you can get. And then train only using that.
Also, I'm curious what would happen if you played a game that runs at 1000+ fps. LIke Quake Arena.