This is literally a game about weight gain, if you don't like it don't play it ffs.
I personally dislike weight gain as well, but what pulled me in were both options for weight loss and the characters themselves. I absolutely love how unique each character is.
So, do not hate on a game for not being your cup of tea. Try to find something else or enjoy other aspects of it.
Ziul put a lot of work into this game, and I really appreciate it.