Well, if they are disrespecting you as a person, DO NOT try to reason with them, dont try and see their good side.
If someone is pissing you off, you tell them to fuck right off, stand up for yourself , its the only way to do it.

And if they don't fuck right off, kick em in the cunt to be honest, so what if they beat the crap outta you afterwards? they wont insult you to your face again.

Be aggressive and swift, don't let assholes like that ruin your childhood, i used to be like that, but then i stopped taking the bullshit.

You can still be a nice person, just one that doesnt get fucked over by less confident more stereotypically attractive people, we are all equally valid.