Down nearly 6 BIs today, running 30bb/100 below EV. No big hands that weren't standard suck outs but need some sanity checks.....

Hand 1.
Villain is an unknown 25/0 donk after 8 hands (no post-flop reads) and bought in for a half stack. How often is he doing this with worse made hands / draws on the turn?

No-Limit Hold'em, $0.50 BB (6 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com
Hero (Button) ($51.55)
SB ($50.30)
BB ($13.50)
UTG ($72.47)
MP ($26.48)
CO ($135.11)
Preflop: Hero is Button with A, A
1 fold, MP calls $0.50, 1 fold, Hero bets $2, 2 folds, MP calls $1.50
Flop: ($4.75) 3, 2, J (2 players)
MP bets $1, Hero raises $5.87, MP calls $4.87
Turn: ($16.49) 8 (2 players)
MP bets $8.24
Hero??

Hand 2.
Villain is a 20/16/3.8 reg. He will cb this flop 100% of the time and probably 2nd barrels too often (60%). I think AQ and sets are both in my perceived range come the turn, but he has probably seen me floating with air v other players. We have tangled a couple of times this session where he has called me AI with worse and sucked out. At this table we have no history, and I am starting to think he may be avoiding me because we are both deep. His bet sizing also seems to suggest he doesn't want to play a big pot here (or is he dying for a raise?!) Is this a good spot to bluff?

No-Limit Hold'em, $0.50 BB (6 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com
Hero (Button) ($119.01)
SB ($38.05)
BB ($50)
UTG ($54.45)
MP ($37.63)
CO ($92.76)
Preflop: Hero is Button with 9, 10
1 fold, MP calls $0.50, CO bets $2.25, Hero calls $2.25, 3 folds
Flop: ($5.75) 9, A, 2 (2 players)
CO bets $3, Hero calls $3
Turn: ($11.75) Q (2 players)
CO bets $5
Hero??