Is the AI just broken in this game? I know nobody cares about SP but still. Sometimes enemies don't notice me when I run straight at them, sometimes (when I'm supposed to hold a position while they attack me) some of them just stand around at their spawn points or wander off so I have to search the entire area just to find and stab them. My teammates seem equally usefull. You can order them to attack enemies, but have fun watching them shoot in the air while the enemies completly ignore them and continue to attack you and only you.
At least they all are AMAZING at throwing grenades. I once watched a guy straight up throwing a grenade in the wrong direction, yet it landed right in front of my feet. The SP seems pretty broken to me. In the first level, when you enter the open area with the cranes you get access to a sniper rifle. So I decided to snipe the four enemies I could spot. When I then moved on my teammate shouted "WATCH OUT, FOUR ENEMIES AHEAD OF US" and they all ran off and took cover. So I had to reload my checkpoint because they refused to move on. Ermm...okay?