Growing up Autistic, I managed to make a lot of otherwise nice people pretty frustrated. That didn't make them mean, but I sure thought they were. It took me a long time to realise the difference between frustrated and mad or mean. I have since re-connected with some of the people I misunderstood and it turns out they really are nice people.
No idea if anything similar is what happened for you. But just thought of a thing I could relate it to, and figured it might be worth sharing just in case.
It might take years before anything changes if so. But it's worth the wait, and the effort.