By Alek Arend NFL superstar Patrick Mahomes still can’t quite wrap his head around how the Chiefs lost to the Bengals in the AFC Championship last season. In fact, his performance is still something he regrets to this day. On Monday, Mahomes revealed he regrets “playing not to lose” when the Chiefs battled the Bengals in the AFC Championship. It cost Kansas City the win. The team, as a whole, simply played too relaxed and Joe Burrow took advantage. “The second half of that game: I don’t want to say we relaxed, but I mean when you lead like you did, you want to make sure you win the game, but y…