Yea i think the instance server was having the same issues yesterday too. what we did was drop queue, get somebody else wh isnt bugged to join, queue for something else, cancel it, then have them leave the group and try again.
People in this thread are missing the problem.
If you get the "Reserving Instance" message, it means your party is full. The duty finder has already made your party, you are just waiting to enter the instance because there are too many simultaneous instances running.
The problem is that amdapor keep is the only efficient way to farm mythology tomestones and since you can only get 300 per week, you have to run that dungeon at least 8 times a week.
They probably have the instance capped where it is for stability sake, and the instance already lags pretty bad as it is. So simply increasing the cap on simultaneous connections isn't going to really solve the problem.
What they really need to do is create other ways to get mythology tokens that are equally as effective. Personally the difficulty of hard mode primals I think could justify a few more mythology tokens. Especially considering people can clear amdapor in about the same amount of time it takes to beat a hard mode primal. It would seem that the number of mythology tokens given from primals was set pretty low to account for the fact that you already already get primal weapons as a reward. However that doesn't really seem like a justifiable excuse when you consider most people that win hard mode primals will just be using relics at that point anyway.
The reason your wait is so long is because 80% of players are DPS. There's simply far too many DPS for every 2 to have a healer and tank. That's why the queue is long... nothing to do with instance servers (unless they happen to be lagging or broken).
There are a lot of jerks that play MMOs. A LOT of elitist jerks too. I never give up an instance unless we run out of time (I'm a tank on my main character). If you want less chance of jerks (still not guaranteed), then you need to make your parties manually through the party search and shouting.