i hate flats

Lost a flip KQ<99 for 8bb.  Then UTG with 30bb opens for a standard raise and UTG +2 calls.  I 3bet AKhh an get flatted by bb with 20bb behind and UTG +2 also flats.  Flop is J76 with two spades.  BB leads for 12k into 55k.  I can't even call.  Fortunately I picked up the next pot 3betting QQ and then a few hands later I opened QQ and picked off a 15bb shove with TT.  Two hands later I called a 9bb shove with AJo.  Shover had A9.  Board ran out AK833 for a chop.  13/309 with 50bb.