Review Detail of underscore_F in Psychic Parasite

I feel like the story is annoying, its good but not my cup of tea. why will you make the readers be emotionally attached to the mc and other characters, just for everybody to die and a new mc comes in. Tragic stories are very realistic but when its unnecessarily tragic thats just annoying and you feel no attachment to the story, and you're like was that death really necessary, someone can live a happy life and succeed. Everything doesnt have to perfect but it also doesnt have to entirely miserable