Whoa there cowboy! Chill out. You seem frustrated. Don't take it out on me now!
If you suspect a bug, check the section of the forum regarding bugs. Or reinstall the game. What can we do to help you if it doesn't work? If it does work and you just don't understand it, we also can't help.
Instead of putting someone down, why don't YOU offer a way to help?
There are numerous guides on how to deal with the dragon. I don't need to add to it. I am more interested in why you can't kill it, over what you need to do to kill it. You are making that difficult, though. All I get is frustration and "I don't want to use builds or the 2 best tanks!". Neither does you any help in this situation!
what tutorial?
what the heck is a theorycrafter? and what is a meta gamer?
The first area of the game. Where you end up killing a Pride Demon. That whole section is a tutorial. You get massaged into the game. Solas come equipped with Winter's grasp, a CC, and Barrier. Both are things you sort of want.
Theorycrafters are people who looks into numbers. They find out, for example, how much a stat is worth or what stat is best. Generally, it's the guys doing math inside video games for fun. 
Meta gamer is the concept of gaming for gamings sake, and knowing something you should not within a game. It basically means we want to play as optimal as possible not for the game, but because we can. Optimal builds with optimal gear, overkilling the game in any way, just because we can.