Yes, AA is just a pair but it's also the best starting hand preflop which means that you are already ahead of everyone else, the percentages are on your side. It's just bad luck that you lost 4 times in a row with them but that's variance and part of the game. After the flop things get a bit worse of course if you don't improve your hand and someone else continues with you to turn, but you are still far from drawing completely dead.Yesterday I lost 4 hands with AA.
As for me, I prefer to play with a card, for example, 6-7,9-10, Q-K, J-10.
More hands I win by collecting Street or Flush.
A pair of AA it so remains just a pair.