So that happened.
I just finished the single player campaign.
I felt a lot of hatred and anger while playing it. There were so many times when I died arbitrarily. They often tell you to run from point A to point B while infinitely respawning guys are shooting at you, and I died about 20 times in scenarios like that.
It was bleak and humorless. I never felt joy or elation, just relief, "Ugh, I'm glad that's over." when I finished a mission.
I wish they would put a single player bot match into the multiplayer maps. That's all I ever really wanted, just like Battlefield 2.