I'm not saying you should do this, but two things I was told as a child help some. Because it's very depressing to be treated as less than human.
I was told to smile because it makes you look more friendly. Not all the time, intermittently.
And I was told to try to speak and explain so people don't fill in there own negative reasons something is happening.
And as an adult I am being taught to assume something positive behind the actions of others, because it helps me feel less victimized and because it helps avoid escalations. For example, since your child might be struggling, I learned that the productive thing to do when the CSE. chair (administrator in charge of approving services in school) looks right at me and lies IS NOT to call her on it. It is to ask "oh, tell me more" or some such, or to say it back as "oh, I'm sure you don't mean ....... Mrs. Administrator, you meant ....." Because once things escalate they get bad fast and it will ALWAYS be your fault in everyone's mind.
Makes no sense to me. But this is what I've learned and am learning. And I can't defend it, it isn't fair.
You and I and all of us are just as human as anyone else!