We all know that the one at fault here is the Amusement Park's higher ups, since they allowed the accident to happen at all. People like to place the blame on someone they know they can attack because humans are coward by nature. MC's inferiority complex really doesn't help her, she puts herself in the position of the weak, allowing other people to trample over her.
Also, it's fun to think that the reason SHY isn't as popular is that because Japan is so systematic that it's hard for accidents to happen. Let me make it simpler.
Less accident -> Less need of hero-saving-the-day -> Less time for the heroes to make their appearance -> Less popular they got
As they said, best news is no news.