I really relate to your experience — especially with AJo. That hand can feel strong preflop, but often puts you in tricky spots postflop, especially when you're dominated by AQ, AK, or even slow-played monsters. I've learned to tighten up with AJo in early positions or just flat in certain spots to avoid getting trapped.
As for QQ, it's one of those "beautiful but dangerous" hands. It's so strong preflop that it's easy to overcommit, but postflop, especially on ace or king-high boards, it can turn into a tough hand to play. I’ve been trying to slow down on wet boards and play more pot-control postflop when facing aggression — particularly from tight players.