What if students make very negative comments about the lecturer?

What if students make very negative comments about the lecturer?

It's important that you don't buy into this; it's probably best to keep your opinions to yourself and keep on supporting the students with the subject - try to get them to focus on the course content and their own study skills rather than on the lecturer.

You have a role to play in liaising with the course lecturer(s) so you need to be onside with them.