BB: $6.10 (152.5 bb)
MP: $4 (100 bb)
CO: $6.83 (170.8 bb)
BTN: $6.38 (159.5 bb)
SB: $2.84 (71 bb)
Preflop: Hero is BTN with K

K
MP raises to $0.16,
CO raises to $0.56,
BTN raises to $1.55, 3 folds, CO calls $0.99
readless but both full stack so prob not fish. I cold 4bet againt the CO where we are deep so i dont go for the stadar 2.5x i want to make it bigger like 3X or i should go bigger like 3.5 ,4 X ? His call is weird I def put him on strong hands like AK QQ AA also maybe JJ some times or TT
Flop: ($3.32) 4

5

A
(2 players)
CO checks, BTN checks
the flop sucks. Also i would check back a lot Axx Kxx boards in 4b pots.no reason to bet hands like JJ TT QQ prob fold and only Ax calls
Turn: ($3.32) Q
(2 players)
CO bets $2.48,
BTN folds
the turn is but cause now QQ beat me and he bets big i think folding its fine
What u think overall ?