Never Gotten to Kill Zhaitan :[
http://www.gw2lfg.com/ is your best bet.
There were still a few groups pugging on gw2lfg.com at the time you posted, but if you’re not in right now, you probably missed them. Try post a lfg up there. The longest time I waited for a Victory or Death group was around 15 minutes. It’s not that hard to find group, you just need to be patient.
The beauty of GW2 is No Endgame.
PvE is about exploring, adventuring and being part of the big story, the big lore.
My friends and I play together all the time so when ever we needed to do group content like dungoens, fracticals and such, We do it together.
My advice is to make friends and play with them, I recommend a form of Voice chat since it helps you make stronger friendship when you communicate that way. I Like using Skype to talk and game with friends.
So ultimatly I think the best thing for you to do is make friends and actually playing with them and you should be set to go. =) Trust me, its more fun with friends.