No. It is the server.
You are mixing up an A vs B of fighters putting together planes of all ages and types. It is not a surprise that fighters with better systems and weapons outgun you.
What i don't like is that FC3 modules are mixed with study sim modules on servers but we will have to deal with it until we have a good bunch of study sims to make servers enjoyable.
Until then, just ninja and take the chance of getting them by surprise or so. You will never win a spamraamer in BV.
You should be the falcon, but here there are bigger birds, so hug the trees and ambush.
Or go to servers with loadouts of the 80s, or other alternatives.
Soon we will have the F5E, maybe the Viggen too, they will mix up together better.
But it doesn't make any sense to try to find artificial balance if you want to be realistic. There is no balance in the real world. Planes were designed to be better than their counterparts or the previous generation. Missiles too.