Seems like he's just a shitty teacher.
Why wouldn't he offer Zoom classes to people suffering with covid? NYU has more than enough resources to make this happen.
Instead he would rather have the students choose between failing and infecting other classmates. That creates a dangerous environment, especially when you go down from three midterms to two.
Also, this isn't about the course being "too hard". The problem is that it's not appropriate for the grade level. For instance, you could be the most brilliant mathematician in the world, but that still doesn't make it appropriate for you to expect third graders to learn calculus.
I don't know anything about organic chemistry, but when when more than 25% of your students are signing this petition then you have a serious problem Especially since it doesn't even include the people who have already dropped out!
When a student spends tens of thousands of borrowed dollars on an education it's not supposed to be easy, but it's not supposed to be impossible either.