What can I do to stop this?

[winsock]

In other words, when the TC queued for DF, he accepted the possibility that his tank might leave and that he would have to requeue. He accepted the possibility that his group might not clear. The tank didn't force him to accept any of that.

When you queue for the roulette, you accept that the dungeon you get may not be the dungeon you want. I mean.... that is what a roulette is....
Why does your party need to suffer from your roulette loss as well? You are demanding and enforcing they take a hit for your RNG fail.

He made the decision he did, took that risk, and paid the cost.

^ The cost was the cost you placed on him. You are liable for that.

The tank that left the roulette did the exact same thing. He made the decision to roll on the dungeon, took the risk of not getting something he wanted, and paid the cost -- a 30 minute lock-out.

You are arguing that you are justified in spending a "penalty" like a "currency." Do you truly not see anything wrong with that?

They did the same thing. You are the one trying to assume they did something different when both were just trying to play the game they wanted to. Both didn't get what they wanted and both paid a cost.

You knowingly and deliberately took action to negatively impact the rest of you party
How did the rest of the party do that to you?

you are the one that has stated that if we don't play by your rules, we shouldn't play at all.

^ where? Also... remember you are 'leaving a dungeon' and preventing the party from playing their duty..... You didnt get your way, so you took your toys and went home. childish.

I'm saying we all play by our own rules and there is nothing you can do about it.

Go right ahead. No one is telling you cant, but your actions are both childish and selfish. Don't cry when you are criticized for that, you earned it. Outlooks like yours are the reason we have things like DF penalties and Need/Greed enforcement.

You lack empathy and are so focused on fulfilling your needs that you step on the people around you. Then when confronted about your behavior, you do things like blame the roulette system...