I don't know if it's inappropriate to post something like this on this site but I didn't have anywhere else to relay my problem. (I'll remove it if it is.) Everybody online had something different, so it was just becoming a bit frustrating to not be able to find a solution.
I have Krita and MediBang on my desktop computer and they both work fine. No lag, no freezing, they run real smoothly. But I notice with the lines I draw, both tablet and mouse, they come out angular. It's barely noticeable in Krita, but in Medibang it's more prominent. It's really frustrating because it messes up any sketching I try to do. Sometimes the beginning of the stroke is completely straight before it follows the rest of the input. Is this due to some settings in the programs? Or is it my computer? I don't have the slightest clue what to do about it.
Medibang - Angular Lines:
There are marks where you can see the angles.
Krita - Straight line breaks:
I'm certain I don't need to clarify this, but just being safe; This isn't just messy sketching, It's called feathering; just a bunch of repetitive, short strokes that can help represent a form more accurately. I would show all examples, but this is already long enough as it is.