I think the rough pixelated edges on the brush you used aren't doing any favors either. Maybe that's just the compression though? Are you making the comic at a higher resolution then downscaling it for export?
oh it's actually not a font at all? I mean it's neater than my hand writing for sure. I think if you try to put a bit more spacing between letters it would help
All caps, while being very small and dense. More spacing, bigger size of the words and maybe even the use of non-capped letters would make it easier to read.
First comics didn't have all-caps-writing and the consensus was that that was much worse... I'll try to be less dense though. I'll also work on my handwriting.
Have you thought about simply using a handwritten type font? You could even create a font from your own handwriting so that it still has your style, but you only have to take the time for each letter once.
Or if you want to improve your handwriting, that is also great to strive for I guess. Do whatever brings joy in your life :)