Tight aggressive players aren't usually calling with 66 UTG.
KTs, JQo, etc in early position is an easy toss.
Try staying within 3.5-5.5x raises preflop, the odd number will fit into your game to further keep your opponents off, though nothing can really be done to get an average player at lower levels to lay down AT "s00ted" on the big blind. Nice continuation bet, excellent laydown. The odds
WILL work out in your favor if you keep making the right play. Don't give up, keep playing and tweaking to perfect your game.
Beats are only other players failing on their attempts to give you their chips.