In my opinion, it's even worse in rhythmic gymnastics, but you're right: this sport is toxic when it comes to how training is conducted all around the world. There are a number of reasons for that:
1) Most coaches learned to coach the Soviet way.
2) In some countries, physical violence and emotional abuse are seen as efficient ways to discipline athletes, and these countries usually thrive in gymnastics.
3) There's huge pressure for traditional programs to keep their results.
4) Similarly, smaller programs feel that if they don't come up with a miracle, funding will be cut, so they put three times more pressure on gymnasts for good results.
5) Age-requirements in women's artistic gymnastics are ridiculous. While in men's artistic gymnastics the boys are allowed to compete in senior events when they are 18 or older, in women's programs girls turn senior when they are 16. It's terrible because 13-14 year-old-girls are supposed to perform very hard skills and their bodies are not ready for that, so the coaches push them above their theoretical limits, and either the girls snap, the coaches snap, or both.
In rhythmic gymnastics all of these points are 10 times worse because the number of countries that are relevant is very small, funding is nearly non-existent, basically only post-Soviet nations are relevant (and Bulgaria, a country which some coaches are equally toxic), and gymnasts over 20 are almost universally seen as past their prime.