What was the point of the chapter? We already had a chapter introducing MC's insecurity, his had making him feel inadequate as a boy/man. We got a chapter where MC decided to exercise, at least it'll give him stamina. This chapter reminds MC he is pretty much nothing (beyond a living dildo), making him think what he should be doing, only to everything being swept under the rug cuz the girls will just take care of everything (giving him all the love he needs). Which is precisely what his dad didn't want, his son not improving, being content in being ... mediocre (I suppose he improves in lasting longer as boytoy). Oh but the girls say he is very kind, it's a good quality, right!? That's why MC gets to bang these top women who doesn't care they have to share him.
MC's dad wasn't shown outright, he is probably feminine looking himself and he project his issues into his son anyway. And it's actually the mom who wears the pants and provide for the family. MC already took money from one of his mistress, the son is just taking the same path as his father probably.
Look, if the manga doesn't want to be serious, that's fine. Just put this useless plot of MC finding his masculinity out and just go the usual romcom stuff, with extra ecchi on the side.