First two villains are donks. Just weird bets sometimes, I think bought in short.
Hand 1
PokerStars No-Limit Hold'em, $4 BB (5 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($419.70)
Button ($398)
SB ($935.70)
BB ($405.50)
UTG ($537)

Preflop: Hero is MP with 7, A.
1 fold, Hero raises to $12, 2 folds, BB calls $8.

Flop: ($26) 5, Q, 3 (2 players)
BB checks, Hero bets $16, BB calls $16.

Turn: ($58) T (2 players)
BB checks, Hero bets $44, BB calls $44.

River: ($146) 6 (2 players)
BB bets $32, Hero

Raise or fold?
Hand 2
PokerStars No-Limit Hold'em, $4 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($127.60)
SB ($176.35)
BB ($1228.95)
UTG ($170)
Hero ($412.15)
CO ($274.80)

Preflop: Hero is MP with 8, 9.
1 fold, Hero raises to $12, 3 folds, BB calls $8.

Flop: ($26) 2, 3, T (2 players)
BB checks, Hero bets $16, BB calls $16.

Turn: ($58) Q (2 players)
BB checks, Hero bets $40, BB calls $40.

River: ($138) A (2 players)
BB bets $44, Hero

Guy here was an unknown but his name and avatar shouted donk to me.
Hand 3
PokerStars No-Limit Hold'em, $4 BB (6 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($388)
UTG ($434.60)
MP ($454.80)
CO ($853.25)
Button ($400.70)
SB ($396)

Preflop: Hero is BB with T, A.
3 folds, Button raises to $12, SB calls $10, Hero raises to $52, Button folds, SB calls $40.

Flop: ($116) 8, Q, 7 (2 players)
SB checks, Hero bets $72, SB calls $72.

Turn: ($260) J (2 players)
SB checks, Hero checks.

River: ($260) 5 (2 players)
SB checks, Hero