It's a chud buzzword I hear often. It's something something "prioritizing diversity at the expense of quality" which makes no sense because the whole point of DEI is to make the workplace more welcoming not targeting obviously impossible and bullshit quotas. Yes DEI is handled horribly because usually the actual policies fail to help employees from marginalized groups work with the same level of proficiency required to do their job.
Hell, even places where affirmative action WAS used it was barely used. 5-4 had a good breakdown of it but essentially it went from actually being designed to fix structural inequality in college admissions to barely being a tie breaker when two equally qualified admissions applicants were fighting for one of the last possible seats. It was like a watered down marinara, weak sauce!