About time we had a challenging RPG in the vein of Baldurs Gate amd Neverwinter Night. I'm glad gaming hasn't moved so far forward they these are forgot about. The fact that this game is co-op as well makes the 'issues' you described even more fun to take on.
BG2 is my favorite game of all time. The devs understood pacing, and thus anything which breaks the flow of the game is either confined to its own space (ie. bodhi's gauntlet), or simply used sparsely as a break from all the combat.
In D:Os my adventuring is being constantly interrupted by stupid trapped areas and silly puzzles. I can only toss so many barrels before my patience runs out.
You've been spoiled by all the hand-holding RPG's that have come out in the last 5-10 years that tell you exactly where your waypoints are, exactly where to pick up the items you need, and what your ultimate destinations are supposed to be. The games that completely take the fun out of exploring; linear storybook games that, if you are lucky, give you a small illusion of being open-exploration games (Dragon Age 2 was massively guilty of this, not to mention worse things).
D:OS was made in the spirit of the old mastercraft PC RGP's of the 1990's. Specifically, games like Baldur's Gate. They are for gamers that like RPG's precisely because RPGs dont "hold your hand" in an unrealistic way, as if some omnipotent god is floating over your shoulder telling you how to solve everything and where to find everything every step of the way. It's about exploring and discovering things on your own.
As for me, annoyingly ambiguous puzzles satisfy me all the more when I finally solve them. Or secrets that don't tell me exactly what I need to access them - if I discover how to access them either through my own critical thinking or on accident, it's immensely satisfying. Games that allow me to completely shut my brain off are not satisfying at all. And if something is really troubling you to the point where you fear you might stop enjoying the game, you can always look online for solutions to problems or difficult fights.
EDIT: It should be noted that in the last 2 paragraphs I'm speaking on good RPG's in general here, not really D:OS specifically. I'm trying not to be biased since enjoyment of such things is highly subjective. So for my only big complaint in this game is the extremely average, unimpressive inventory management.
See above.