the bots are more retarded than some noobs.
Alos, laton I told you what mod to get. The BARD mod uses the same bot engine as man down, but I don't know about the counter-strike maps. What I do know, is that it also introduces "real damage" to the game, which is somewhat like one shot kills, but you'll need apporximately 10 bots on the hardest level to actually get some kind of opposition.
Other than that, the bots need a lot of tweaking. I guess that will be resolved in later versions, that is if they're still working on this mod.