Turns out you can also email MileagePlus… I emailed them about the same issue I had with the hostile flight attendant. Turns out they seem higher functioning, yet insufficient. Here is the MileagePlus response:
Dear Mr. Williams,
I was very concerned to read about your inflight experience. It’s contrary to our commitment to providing exceptional customer service.
I’ll make sure to send your feedback so we can review it with the employee. When you fly with United, you expect us to treat you with dignity and respect. There’s never an excuse for unprofessional behavior and I’m sorry you didn’t have a more positive experience. We value your honest feedback as it helps us to improve our services.
I appreciate you chose United for your travel and hope your next flight earns a more positive review. On behalf of United, we look forward to serving you on board in the future.