The reason I think that is Covid. With kids learning remote and going all digital, the facade was lifted from teaching. Parents can and did directly experience what our kids were going through.
Our kids’ lowest standardized State scores were with teachers who were terrible. A science teacher who hated kids in general (really). A general teacher near retirement phoning it in. A math teacher who said “read section 5.6 in your book and do the homework” - and that was class.
Our kids did well where the teachers were creative. Where they interacted with students. Where they gave direct feedback and corrections. Where they gave learning reinforcement extra credit to help them focus in areas they had trouble.
In good public schools and many private schools, these bad teachers are not tolerated. In poor ones, the bad teachers flourish, and the kids suffer.