This study from MIT backs you up easily.https://sloanreview.mit.edu/article/toxic-culture-is-driving-the-great-resignation/) and I agree with you 100%. What I’m seeing and hearing, while anecdotal, surely, backs you up. People are fed up with being treat badly by managers who should know better.
“Our analysis found that the leading elements contributing to toxic cultures include failure to promote diversity, equity, and inclusion.”
Uh, no.