The older I got, the more I realized I can't self insert in mangas. The stark difference in physical profile increasingly stopped the suspension of disbelief.
I never was the MC body type. I'm more baseball cap dude's shape, drawing the same general reactions in real life as the running comments here.
I would be background fodder, if I'm allowed to exist at all. Or worse, I'd be the foil to everyone else's appearance. Then portrayed like a one-dimensional shop NPC or as a catchall bad guy like here. Fat folks don't get to be the hero or have agency, and when we do it's played as a novelty.