Should I quit? 35k hands at 1/2 and still breaking even..Stats inside

[NDHand]

Hand 5

In this hand I bet the flop, bet the turn and check the river (fold if C/R)

Another example.

Hand 6


Check the river unless he's a total calling station

Hand 7

Ks10c on CO.

Fold the river, my guess is he has KK or QQ. Either way, it's highly unlikely you have him beat with K-high.