I have taught at college and university in STEM subjects, and also professional corporate training courses on software development to senior and lead engineers

I have taught at college and university in STEM subjects, and also professional corporate training courses on software development to senior and lead engineers for about a dozen <companies you have heard of and use their products every day>. And I will say that universally, every single class runs the exact same way. There are those that want to learn, and there are those that are killing time and will argue with you until they are blue in the face that they deserve a different grade, and they have come up with more excuses and reasons why something wasn't done than I could think up in a decade. When I used to teach at college and university I would think "there's no way you are ever getting a job in this field" and then when I did professional corporate training I would think "I have no idea how you keep your job, but I do know that if I showed up for an interview, you wouldn't give me the time of day." You can argue with "well maybe you're a lousy teacher" and whether that is true or not, it doesn't account for the flat out denial and debating, and dare I say it, outright lying, about why the assignment wasn't done.