Preflop and flop are fine, river bluff is well-chosen, but the turn barrel with a weak draw in a bad spot burns EV.
C-betting here with KQ and both a gutshot and a backdoor flush draw is good; sizing a bit smaller would align better with how the range wants to play.
Note: The flop bet is slightly larger than ideal; solver prefers a ~33% pot c-bet with this combo, keeping the range-wide strategy coherent and risking less with a marginal draw.
Turn should be a check with this exact hand — equity dropped to just a gutshot, villain now has the range edge, and SPR is low, so barreling risks too much with poor equity.
Note: Solver wants us to check this combo the vast majority of the time; betting half-pot with near-bottom of range and only a gutshot in a spot where villain has slightly more strong made hands is a clear over-bluff.
Jamming river as a bluff with KQ high is a good use of one of our weakest hands when ranges are polarized and SPR is low; this combo is meant to bluff a lot.