WHat shoulld i do if my cousins disrepects me?

Salaam,

I have a issue with my cousins. The main problem is they don't respect me at all. no matter what I do. they don't seem to accept me for I am. I have Autism and I don't even speak Arabic. they do, the first family who came to the states was ok for now.
I tried to be nice towards my cousins. the older daughter in that family is disrepctful towards me. my uncle who moved out don't ever respect me at all. when he visited us. he will completely ignore me but he will speak to everyone. his kids will do the same.

the second family, when they moved out. two of my cousins will ignore me. I tried to add them on social media. but they ignore the friend request.

the third family, I'm tried my best to be respectful towards my cousins. the second duaghter wanted me to teached her english. so, I agreed. I let them use my Peacock account so, they can watch WWE.
but, they started to be disrepectful. the first duaghter will locked herself in her room everytime I'm around. the second daugther will tell me sorry no english. the first son, will blasted his iphone so loud while I'm watching tv.
the second son also don't respect me. everytime, I visited them. the cousins will speak arabic. and I'm the only one that is left out becuase I don't speak arabic. some of them are backbite their own cousins and they told me this.

what is the islamic thing to do? plus, everyone says it's a part of their culture to do this? So, please help me.