[City of Villains] I understand that many of you used to play Everquest or some other game where it was accepted for team-formation to take as long as a half-hour. Apparently, there are still games where grouping is nigh-mandatory and forming a playable team takes that long.
Stop playing those games.
Do not play a game where you cannot solo, or where teams require certain classes in order to play. If you cannot play without a dedicated healer or tank, do not play. Yes, there can be some things that require particular classes, but if normal play requires any significant organizational dynamics, just find a new game. There is a place for niche games requiring that, but you would probably be happier elsewhere.
Now that we have eliminated game-related reasons why you might need to wait, the recommendation still applies. If you are waiting fifteen minutes to start a normal mission, just find a new game. You are an idiot. If you need the fifteen minutes, you are an incompetent player. If you do not need the time but take it anyway, you are an inconsiderate jerk.
Seriously, City of Villains is not Master of Orion III. If I teleport you to the mission entrance and you are still standing there ten minutes later, something is wrong inside your house. Unless a child just set something on fire, the problem is probably inside your skull.