Huh? What? This isn't remotely true at all, not in the least. You can sue a company in small claims court all you want, a company can and does also sue you in small claims court as well. My sister in law was sued in small claims court by a large company.

If that were true nobody would be allowed to sue their landlord since many (most?) landlords operate as LLCs. Small claims court is the primary way landlord-tenant laws are enforced.

Even if it was, nobody brings a small claims case in federal court, even if that was allowed. You bring a case in your State court and every single State has different rules and procedures for small claims court.

There are plenty of small claims against Comcast.

https://consumerist.com/2008/01/21/suing-big-companies-in-sm...

I've never heard of any restrictions suing a company in small claims. It looks like it does happen from time to time:

https://consumerist.com/2010/04/09/judge-forces-comcast-to-p...