Are they toxic, because of your personal views on the matter or you have private discussions with the Bulgarian girls? Please share your contacts, i would very much like to meet them! Because they have always said the their coaches are like a second mother for them and are grateful for everything they have given them.
Rh gymnastics is by far the most popular sport for girls here. BY FAR. Every little girl wants to be like the Golden girls, because they are of our most cherished athletes in general. Everyone knows how hard it is to make the team. The girls know it, the parents know it. There is harsh training, there are many sacrifices, there are big regimes, there is immense pressure. Like in pretty much every other sport.. If you want to be the best, you can't dilly-dally your way. Everyone knows what to expect, it has never been a problem.
Also, about the 20 thing. Don't know about other countries, but here, the statement that the federation/coaches dismiss the girls when the clock turns 20 is also a false accusation. In Tokyo Vladinova will be 27, Taseva almost 24. In Rio, half of the ensemble was 25. In London, Silviya Miteva was 28. Is Bulgaria sending these past their prime athletes, because we don't have anyone better ?!
Each girl retires when they want to. No one is stopping them deliberately, because of their age... They can continue how much they want to, but after 1-2 Olympic cycles they want to focus on other stuff, like finishing they education, starting a family, making a change in their life etc.
Because in Rh gymnastic there is the Olympics and only the Olympics. The program is for 4 years. This is not football, volleyball or tennis with the Grand Slams, where you can say "Oh i will stay one more year". If you are 22-23 and don't plan staying for the Olympic cycle till you are 26-27, then there is no point in continuing. You are crafting 3 years the compositions and athletes preparation for the next Olympics. And the girls know this very well and if there is no help needed to make the transition, they are not staying for one more Euro/WCH that brings nothing.
If you think (or want) the sport to be one of those, where we have the same names competing for 20 years, i'm sorry but it just doesn't work like that. The sport is not build like that. 1-2 Olympic cycles is what you get from the top nations. It can't be from 18 to 38, unless you are a small nation and that one athlete is what you only have.