Hitting a major roadblock

[Lanatir]

So far i've been having fun (whenever i was able to log in).
Now it seems i reached a major roadblock. I like to play a damage dealer. Just because i suck at healing and tanking, thats it.
The storyline quest makes it mandatory that you run several dungeons in a row at around level 16. And that is where it gets impossible to proceed. Using the duty finder i spent 6 hours waiting for my first dungeon cause there is simply not enough tanks and heals. When i was done i was really happy cause i thought i can now proceed with the storyline. Well...no. The very next quest is a dungeon run again. But i dont wanna spend another x hours waiting. I dont blame the people that dont wanna play healers or tanks.

I used public channels to ask for groups. again...and again. Im sure i got reported for spamming.

Still havent done the second dungeon. I was told that the next thing you do after that is a third dungeon. If thats true, my time with this game is over before it began.