I say losing A-10 to AA is a bad beat. And he was put all in. When you share a card like that, you are an INCREDIBLE favorite. Of course, Fink would tell you to Fold AA pre-flop here

One maxim I like is this: If yo uwould play the hand the same way if you could see your opponents cards, then you played it right. And I dont think ANY of us would fold AA against A 10 pre-flop. If you would, please come to my table.
Having said that, bad beats are part of poker. It IS gambling. You take chances everytime you make a bet. Sometimes, you get the shaft. Take the holiday week off and get your breath. Come back new and improved.
Merry Christmas all