I've considered it. But they have a right to refuse service for any reason. Only damages I could claim is 10 dollars from my last month of Nitro. Not sure what they're doing counts as disability discrimination either. Probably don't have a case.
I would claim the total amount you've spent on Nitro since you first made your account. That was an investment into your account and its history, and now it's gone. You sound like a sympathetic plaintiff. You have a shot. Best case, you get an actual human to look at your situation. Worst case, you're out filing fees and end up back where you started.
I also live in a state that permits injunctive relief in small claims court, I think. Although I'm not sure how much teeth that would have. I'm kinda concerned about them digging into my old DMs because I'm sure they'll find a reason to make everything relevant they possibly can, and they end up on a record I can't seal or something, costing me all sense of privacy and dignity.
I'm generally clueless about the process in depth, admittedly.
Depending on the area, lawyers (as outside representation) may not be allowed in small claims court, too. At that point, I believe they generally have to send someone working for the company who can represent them directly.