It seems to me the difference is your focus. This guy collected women like Pokémon and grew to resent them when it still left him unsatisfied. You focused on yourself and your own goals, social skills, and fitness. Seems like maybe the answer is fixing yourself, not trying to fix others.
That's the gist of it. This topic was actually a widely discussed topic back in the day. Some of the posters noticed a somewhat dangerous and unhealthy trend to define yourself by the women you shag and rightfully pointed out that it will leave you empty and unhappy in the end. I don't think that message really got through. I think there is a natural human tendency to overdo things. It seems that not everyone has a natural counterbalance in their head telling them that maybe they over corrected and need to return back to center so you get guys like this that went all out collecting lays for the sake of it and defining themselves by the women they shagged.