And the worst part is, sometimes it stays with you for longer than you'd think. I was an overweight kid for the majority of my childhood; got a lot of shit for that from my family, classmates, etc. Struggled with making new friends, talking to people and looking at myself without disgust and self directed anger. After I lost almost 1/4 of my weight in middle school, it astonished me how differently I was treated by others. People came up to me for a quick chat and just generaly enjoyed my company. My family pointed out how healthy and fit I look compared to years ago. But none of it matters, because my mindset remained the same. I still see myself as a socially awkward, weird, fat kid who nobody wanted to do anything with. It impacts me less now, but still does. It's unfair and fucked up, but there's not much you can do to change that about others. All I can say is that you're not alone with this. Best of luck to you, dude.