In fact, I have heard that minimally there's kind of a toxic labs blacklist maintained in some Chinese message boards. At least that's what a fellow postdoc told me when I mused why we suddenly stopped getting applicants from China to our lab!
What you need to ask is: does the instutition side with the academic in cases of misconduct (e.g. inappropriate behaviour?), or do they side with the student? Do they have a robust pastoral program? Would the students say that they feel supported?
I can categorically say there are awful advisors in all institutions.
A friend got a position in Cambridge. While their advisor was on vacation my friend - innocently - set up a group Slack. When the advisor returned, friend was accused of trying to steal the group. It was a bizarre situation.
I know people at less well-known universities with more mundane issues, like not being supervised, and it's taken them years to get the department to do anything.