Afaik, small claims courts are for specific monetary damages only. I feel like it would be hard to prove specific cash amount lost due to Amazon actions. It is also very likely one or more of documents one have to accept in order to open seller Central account requires signing away the right of settling dispute in courts, and instead use arbitration process.

Interesting idea - has anyone tried this?

Does Amazon retaliate and ban you permanently if you win?

If you're already banned, you might as well try to get what you can out of the situation.

Can’t the court file an injunction against banning?

I always wondered what would courts do about extrajudicial retaliation