This person likely doesn’t have a case. The reason McD lost the first coffee case was because at the time they were offering free coffee refills, so they cranked up the temperature so people wouldn’t have time to sit and drink multiple cups.
Dozens of people had already been injured by this practice by the point the famous injury happened, and the courts had already warned McD to stop.
It’s the internet, so I’m not sure why anyone would be surprised.