When I was very young I'd get shit on even if I didn't speak. Someone told me that if they didn't make fun of me, then they themselves would get made fun of. I didn't talk to anyone and was excluded from everything. I don't even know why they made fun of me. If I tried to sit next to people they'd shove my tray to the other end of the table. I do know they'd make up things and blame for them, or get me in trouble for them, that I didn't do.
But over the years, I've gotten treated better and better. The biggest thing that made a difference is gaining as much muscle as my genetics allow (not very much but noticeable). Another thing that helped a huge amount is social skills, specifically attack social skills. If someone makes fun of me IRL, I can completely shred them in front of the group in a way that shows I'm not emotionally affected by them (relaxed) and see them as pathetic. Illuminate their worst insecurities, while looking like the good guy to the group, to the point where they will back down.
TLDR: Gain more muscle, Gain more social skills.
Everything about you needs to be scary to be treated well (size and muscle mass are the most important part of that equation). No one gives a fuck about any one in this world, people avoid pain and pursue pleasure and that's it.