Review Detail of RainbowBeheader in Battle Royale of the Sinners

i did enjoy this until? i am sure author can guess which chapter based this is there on webnovel i would give something like 4* or little more BUT after 27th chapter it went down and at 30 i dont care anymore so u have mc who spend so long in hell until he found his gf but he have no problem with starting harem right after this? he knew Friday so long so i can understand but he just met retarded idiot canibal and is ok with her?