Ok so I didn't forget about this thread, just been hella busy. Starting off with Donnie The Fighting Psychopath--
First thing that jumps out at me is the artwork. Honestly it's great. It reminds me of late 90's/early 2000's cartoons, Invader Zim in particular. There's some room for improvement, like in character's facial structure and things like that, but you've got the look down. One thing I had trouble with was the text in a bunch of the panels was waaayyy too small. for ex:

I'm reading this on a 2k monitor, but I still have to either sit 2 feet away from it to read this or zoom in (and that just makes it blury). Try shooting for less text per panel. Especially smaller panels that are better utilized by sound effects and quick phrases.
Love the characters - I think the dialogue is hysterical and their reactions to things happening like the bus tire exploding are fitting for the theme. Again, Ms. Gretel really reminds me of Invader Zim. She's practically a spitting image of Ms. Bitters. Her attitude also kind of reminds me of Ms. Viola-Swamp from Ms. Nelson Is Missing.
Really like the vibe of the setting too, and the background designs are clever. If I didn't know any better (or if I was a facebook algorithm that can't tell the difference between a cat and a cow), I would have guessed the class room was a gathering hall for some sort of nazi nutjobs with that flag in the background lol.
Good work so far, looking forward to seeing what else you do!