How bad is KJs? Please read to understand

[gotribe28]

I was playing a local .25/.50 cash game this weekend. I bought in for $70.00 and lost half on a bad beat (not happy). About 10 min later I am in middle position with KJs and decide to make a play. I bet out $3 (standard at this game) it is folded around to the BB (tries to steal alot) who pushes all in for $40 I swear a bit and ask if he wants my $3 that bad... Long story short in my tilt induced rage I call with my $35 and tell the owner to get ready for the re-buy. Well the flop is JJ4, and the turn is a K. He turns over AA and turn over my KJ and the tirade starts and doesnt end for 3 hours. Am I really that bad?