I dont realy understand what people have against the main, he is an ahole becuse he is out for REVENGE after beeing tortured, druged and used. Yeah he doesnt do the god guy run in his second chance but, he dosnt torture or kills them in anny sadistic way (yet) he just puts them under drugs, so its somehow Karma. Hes just a weak personality thats all.
i find the manga more boring becuse the MC doesent really face trouble and can basicly just do what he wants.