Chapter 1 did MC dirty. Bro is mature, stands up for people, is eager to learn from mistakes, has the right mindset, and understands what others are thinking (not about love though, can't keep the harem that way).
So I couldn't see why he was such a failure. Understandable that he made mistakes at his job but those were kinda outlandish & what drug was his ex on to cheat and dump him.