Why does this franchise never seem to fix the networking issues?

[Omen17 1]

I've been playing Arma since OFP and it really seems like the multiplayer experience in this "instalment" hasn't changed. I'm so incredibly sick of shooting other players in CQB just for them to soak it up or die two seconds later. You can do everything right and have a massive advantage and the fight will still end up 50/50. Why cant enemies drop when they're shot? It really seems like BI doesn't care about the multiplayer experience and completely neglects it. I mostly play on modded servers which does seem to increase this lag time a small bit, but even official servers are plagued with this issue. Most games when you shoot the enemy, its crisp but in Arma its the most unsatisfying experience. 

[methal0-1 0]

Yeah coming from mainstream FPS this really doesn't feel good. Even if winning the fight unharmed it's immersion breaking and unsatisfying