Inside abyssea the problems are that atmas and bosses are too strong. When they were first introduced the bosses were handled like pre abyssea NMs and were about as difficult. Then people started unlocking lunar abyssites and it seems that in order to compensate bosses were given much stronger abilities and stats.

If atmas weren't as strong and bosses didn't have so much HP/overpowered abilities then part of the problem would have been solved. It still doesn't change the fact that the hate system needs an update though.