What makes Krita's canvas operations feel so "wrong"?

Develop Artists Feedback & Testing
19

I’ve done a lot of theorycrafting, and came out with these two concepts for what I think is happening:
Comparing 1000hz to 125hz:

Stutterbug
Stutterbug2000×752 280 KB

If Krita’s internal FPS is unlocked:
Stutterbugfull
Stutterbugfull2400×914 489 KB