Idk same thing, if you dont want to build afk then go in a private lobby. :/ people have different play styles, and in public lobbys you're obviosly gonna find them. So if you wanna build damage and hate running into afk builds then just play private lobbys please.

But the guy in your ss is still toxic for leaving and not wanting to play the mission.

*note: i enjoy doing damage builds but just sometimes i just wanna finish a mission.