I dont think they even played so bad. Colorado is just a way better team. Kings are in the bottom-middle of the pack until/if Kayliev, Turcotte and Byfield reach their potential, the roster players like Kempe, Vilardi, Bjornfot, Anderson keep growing, and some later pick value guys like Faber, Fagemo Chromiak and Grans become good NHLers.
They are not as good as teams like Colorado and Carolina but they arent as bad as Detroit and Anaheim. Petersen played amazing and its a good experience for the kids to see how a good team comes at you. They got a spanking thats for sure.