I don't absolve K1 of partial blame he is the QB so of course its also on him. Petard though is also part of this puzzle and he comes from a run dominant offense that was in the toilet for years. He has brought that same mentality here and we are seeing lows at every position outside of RB & TE. We don't have a single WR anywhere near 1000 yards for a 17 game season.
I can't see MO running this offense back next year without changes to either QB, OC, and or other coaches. He drafted CHJ at 4 and he can't be happy seeing his new toy get frozen out of an outdated offense.