I don't think there's zeroing since there isn't bullet drop in this game as far as I know. And I haven't been getting issues with scopes either, but the way the game is now you can't trust only one person to tell you what's bugged or not. But maybe you're also just missing.
You can trust me to tell you to put a laser sight on your gun, and trust the laser indicator MORE than the center of your scope... (most scopes will put a bullet BELOW the center...so you will always hit chest armor when aiming for the head, etc)
They're fixing them...slowly. The holo and now 1.5 PKA are now pretty accurate, but NONE of the scopes are perfectly zeroed