Comment by w4der

I don't care how good you think it is, the fact that it (back when I used to be a TA) would break if two TAs tried concurrently grading different parts of an assignment of a student is bonkers. The workaround for that was to use a Google Sheet document so TAs just looked at the submission in Canvas, then filed in their grades and feedback on the sheet. The issue is that Canvas, as far as I could tell, did not support mass uploads from a csv, so we had a script which would read every entry on the csv, map that to the student's ID and grade them, which made it look like the TA which had generated the API key graded all of the students (and would get all the backlash from poor grades).

I completely agree that it is not trivial software in the worst sense, it tries to do too much, while not being particularly good at any one of those things, and is way too rigid for how diverse the needs of different courses might be even inside a single faculty. And saying "It's AGPL, just self host and add your requirements to it" is not really useful, that would mean way more money and effort than what a university's overworked IT dept. is capable of.