I’ve watched it now. If you’ve watched a lot of Professor Dave content, you’ll know that he is concerned with science denying nonsense, and clearly thinks science communication is important. So I can see why he is worried about Hossenfelder - who he admits has the right background and is an excellent science communicator - using the level of trust she’s gained to support nonsense that gives support to science deniers.
Sure academia has its issues. What field doesn’t?
She puts out lots of videos on lots of subjects, which Dave doesn’t think is wrong in any way (since he admits to doing it also.) But even with her background she can’t possibly keep up with the latest advances in so many areas of physics and other things. There aren’t enough hours in the day. Which is no problem unless you convince yourself that anything you write is state of the art and correct because you have lots of subscribers.
Good science communication is simplifying science enough to be accessible to the general public and staying correct. It isn’t saying that qualified scientists are full of crap without taking the time to write up the reasons, submitting it as a paper, and seeing the comments.