quckily glancing at my BB hands the biggest loses are coolers such as
KK vs AA in the blinds QQ vs JJ in the blinds and some bad beats.
here is the worst hand I found that was not a suckout

flop seems spew when his range is KT,KJ,KQ,AK. I guess he could have some hearts AhQh AhJh etc.
PokerStars No-Limit Hold'em, $0.10 BB (5 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (BB) ($10)
UTG ($9.90)
MP ($14.75)
Button ($9.85)
SB ($10)

Preflop: Hero is BB with ,
3 folds, SB bets $0.30, Hero raises to $1.30, SB calls $1

Flop: ($2.60) , , (2 players)
SB bets $1, Hero raises to $3, SB calls $2

Turn: ($8.60) (2 players)
SB checks, Hero bets $5.70 (All-In), SB calls $5.70 (All-In)

River: ($20) (2 players, 2 all-in)

Total pot: $20 | Rake: $0.95