> Part of this is probably unconscious, but another part is probably explicit assumptions about the person's self-discipline, e.g. the fit guy must get up at 6am every morning and go for a run, and the obese guy probably sleeps in, eats trash, etc.

More like stereotypes.

For some reason I took both GLP-1 and Ritalin everyday, having moderate exercises despite throwups, only see myself gaining weight rather than losing. I have no idea why both drugs that claims to lose weight only to do the exact opposite, and perhaps I'm the kind of people who can only get fat and not losing it despite some joint efforts.

Perhaps it is not enough and I have to go full aerobatic and ketone mode. Money money money.