They must be letting someone else use their account as they frequently lose to very low rated players.
I would think that chessdotcom might frown on letting other people use your account but maybe im mistaken.
Actually, they may have been playing using the blindfold setting... I don't know why I didn't think of that sooner...
I don't know if they were letting someone else use their account or what but here is the game:
I thought their play was good until they chased my queen for seemingly no reason and Rc2 seems wrong as well.