At it's core, Far Cry 2 is an arcadey shooter that wants to be "realistic" by adding in half-baked emergent mechanics and adding in a crappy AAA blockbuster film filter. It's too annoying to keep playing. If you genuinely want realism, start getting into milsims. If you only care about realism when it's depicted as been gritty and miserable, the S.T.A.L.K.E.R. games do a much better job at that