I'm a 21 year-old-male for context.
I brush & floss twice a day and just had to get FOUR more fucking fillings and my mouth still hurts all day.
I had really really rapid hair loss when I was 15/16, and I've been on minoxidil and finasteride for over a year and I'm still beyond cooked (Norwood 3/4).
I eat relatively healthily and walk miles a day to work and class and I'm still steadily gaining weight. I work 2 part-time jobs and am a full time student so going to the gym is hard, but I'd really expect myself to not gain weight on 2 meals a day where I'm watching what I eat and at least 3 miles of walking a day.
I'm fucking sick of my body not responding to my efforts of trying to improve myself when everyone else doesn't fucking do shit and stays completely fucking fine.