The end of an unprecedented semester is perfect for taking stock of your course and reflecting on your teaching.
One way to evaluate teacher effectiveness is to look at your teacher evaluations. Although students are not pedagogical experts, they can provide valuable feedback regarding instructor preparedness, availability, and impartiality. It is important to approach teacher evaluations with an open mind in order to identify areas for improvement.
Of course, as you are noting down the negative, it is also important to reflect on your strengths as an instructor. The only way to notice improvement is through periodically reevaluating your effectiveness by monitoring how well you maintain the positive and improve upon the negative.
Also: if you are teaching in Spring 2021, check out this article from the University of Pittsburgh's Teaching Center for some tips and considerations for the Flex@Pitt term ahead.