I think people simply don't realize that its just a copy of the koikatsu game / or a standalone addon at best.
Why all the guys in the game run like faggots? Well, that's because the koikatsu game doesn't have the run animation for male NPCs, - only for females. The animations, the maps, are all from there. With a mediocre dialogues and non-existent character development on top.
And yeah... The way the main character is portrayed and interacts with a majority of the girls is just absurd.
And why should I wait 1 week to gift a flowers to a specific girl if I can just start koikatsu and see the same sex animation there? For the awkward and cringy dialogue?
You have to work REALLY hard to sell the cheesy macho main character guy to the public.