...then RUN the dungeon if you dont want to wait 30 minutes? Roulette is roulette and sometimes you're just... "unlucky"... I'm happy when I get Aether - its the one with the highste eso-reward after all, thats also probably why people are running it.

And again... if you're tired of waiting dont leave the dungeon. You really earn this 30 minutes each time you do this