Because it breaks the game for everyone else. Yeah supers destroy bubbles in theory, but it is nearly impossible in game. Even if you do manage to kill a couple of them, they will still re spawn with full super energy ready to go while you are over there attempting to shotgun them trying to get another super up. The only reason I am "complaining" is because it causes severe imbalance within the crucible and ruins the game. Imagine not being able to get a single kill due to them constantly golden gunning you. Most of the time it is not really team coordination, but rather 2 hunters that know how to golden gun spam EVERYTHING. Quite often in these situations the titans are all huddled around each other spawning in loads of orbs and letting the hunters do all the work till they get heavy ammo. Lastly "complaining" on the forums is how things get fixed in the game. If people never voiced their opinions on the forums things would never get fixed in the game.

"Not team coordination". Ok. Main a defender. Now find three other defenders. And go try to do the thing. I guarantee if you're not communicating and working with those other 3 defenders, you won't "break the game". If anyone can coordinate a strategy like this, especially in Control, appreciate it. If you lose, take the loss. A severe imbalance is everyone running around with Exotic Hand Cannons instead of anything else. A severe imbalance is everyone running around with shotguns as if they don't know what a Primary weapon is. A severe imbalance is joining a game in progress EVERY game to find Defender Bubble City(Which you said was rare, and thus, not a realistic situation). What you're describing, is your game loss. BTW, I don't have to imagine it. I've lost control games to this strategy. Even after losing, I can't get mad. I admire that teamwork. I think that kind of coordination is what 6v6 is all about. Just like strategy and coordination wins Skirmish games, or Elimination. If a team worked together that well to "break the game", it's a thousand times better than the 12-player cluster-blam!- that Control and Clash usually tend to be. Also, one last thing. Look at the fact that nobody has remotely upvoted your post. It doesn't look like "everyone else" is having the same problem as you are. You're crying over spilt milk. If seeing this takes the fun out of your game, quit playing. Leave the match. No one else is judging you. Chances are half your team leaves when they see more the one Defender bubble in one place anyway. Don't stick around hoping randoms can help you stop these terrible evil people exploiting their support class. And if you decide to stick around and lose, just take the damn loss. Half the "nerf this OP thing" posts on here are asinine, and the disappointing part is that Bungie being equally asinine listens to the wrong half of balance posts. So for the sake of not nerfing Defenders because Titans already have a small list of awesome things going for them right now, just stop. You lost to a good fireteam that knew what they were doing, what they wanted to accomplish, and how to accomplish it efficiently.