Students not engaged at all - despite the efforts of their instructor My institution moved all courses online this term. I spent a great amount of efforts:

Pre-recording 3 hours of lectures (accompanied by 2% weekly asynchronous quizzes on Moodle)
Holding two 1.5 hours of live Q&amp;A sessions weekly on Zoom

However, the attendance of the Q&amp;A sessions have been embarrassingly low (less than 30 out of 320 students). Although students attempt to follow the weekly lecture videos, the vast majority of them only do so about 1 or 2 days before the weekly quizzes are due.
Nonetheless, students simply just complain about the workload in general (not just because of this course, but for the accumulated required screen time from all other courses).
The end-or-semester course evaluation will start soon. While I am confident that I have done all I could have creating quality learning materials, I am pessimistic about that the majority of students might just put very negative comments just because they are not happy about all courses moved online, not because of my teaching quality.
Is this something I shall expect in this very difficulty time? To me, it is just unfair to receive evaluation from students who mostly do not even engage in the content in the first place.
Let me know how you folks think?
I can't really answer the question, which seems to assume (and presents as the major issue) that you get bad feedback which may not be true (the students still have what the other lecturers do to compare, so I wouldn't assume they use your specific feedback to complain about the general situation).
I wonder if you had to do pre-recorded lectures. We do (and record) lectures in real time with students present online, which has the advantage that students can ask specific questions on issues that may affect their understanding of what follows when they arise. (I do realise that this could be problematic with 320 students, however it may work in your favour that only a small number of them appear to be willing to interact.) Surely it makes things somewhat more lively.
One thing you could do is to have online surveys about their satisfaction, how they perceive the course, what they like, and what can be improved. You don't seem to have a clear idea on how students use and perceive your course, and you could do something to improve your knowledge on this.
To some extent online teaching encourages students to hide and not participate and do things last minute. However I'd think something more can be done to encourage interaction. I also have a written questions and comments forum, which is well used (if mostly of course by a minority of active students, but that's how these things always are and were before the age of Covid) on top of being available for online Q&amp;A.