No thats just wrong. The older BS2 is the more realistic one of both. BS3 adds IGLA air to air missiles that the real KA-50 never had and the added Onboard Defense System is also questionable.
They also used DCS mods to scare the world https://www.thedrive.com/the-war-zone/tailless-warplane-concept-may-provide-clues-to-chinas-future-fighter-ambitions
My guess is that the airport has empty warehouses. So there are no weapons and stuff in its storage to mount on your aircraft. The only reason why you have weapons when you spawn is because its a preset.
You want to understand what happened during you last light ? Download and use tacview to analyse your flights.
Before flying on a multiplayer server, please read the mission briefing.
Most servers use Caucasus. The biggest DCS server Growling Sidewinder and Enigma with over 60 players are on those maps. Make sure to be on the latest Steam/Standalone open beta version to be able to join them.
Are you flying a turn while the missile is incoming ? It belive it gets the distance info faster when you turn because triangulation is easier when not flying in a straight line.
I hope you have a long breath. When VoIP was introduced, it caused massive lag for MP servers who had that activated and most servers wont turn it back on until its as good as SRS