Is this what it means to get older? If i were 15 years old i would read it (not like it though, even in my 15y self MC is too wimpy).
Many people defended it because plot and story doesn't matter we came to see titties....Like if you cam to see titties go and read doujin there is literally not plot or it is completely lacking any brain cells but titties are good.
It's a freaking fetish manga, with edging being the fetish. Not going through full sex but not really rejecting it and when something might really happen some unknown factor ruins it.
Lastly it's hard to relate to MC's like that, i'm pretty sure even Japanese hikikomoris wouldn't reject a woman like that (though they might act like totals wimps).
Maybe for standard Japanese losers this MC can be relatable (they think of themselves as good guys and imagine that despite their mediocrity they might have something special in them). Of course losers in other nations might have the same fantasy and mentality but even in their fantasies I don't think they imagine themselves as total wimps and doormats.
So i just do not understand the appeal Japanese public has for that sort of male archetype. Yes i know that harems are mostly about girls and cardboard guys so that anyone could self-insert but loser mentality, wimpy behaviour and self-destructive agreeableness are strong character points that are just unattractive to anyone....Like any character or a person who lacks self-respect is usually disliked or walked over.