I feel like people have shit builds in order to have such problems with bosses. It's almost as if people just google "PoE meta build" when playing PoE1 and don't think twice. Since there are no meta builds yet, people are struggling to make a functioning (not even decent, just functioning) build.
Builds? I spent hours experimenting with the skills and how they combo. Shit is shit no matter how you try to polish it. There are few things you can do, with high chance of failure that do more dmg than basic attack.
I don't know how the various tidbits will arrange in end game, maybe it's possible you can get some coherent gameplay. But atm, while leveling, warrior is an absurdity. And I'm not talking performance wise since it's the first class I played. Game wasn't particularly difficult when i was sticking with the obvious spam basic attack 90% of the time. But I keep trying to understand what the actual fuck those designers were thinking, and trying various things and so far... NOTHING.