I disagree, I think Dark was much more coherent. It was admittedly a bit convoluted, but I think it did a good job tying everything together.
Whereas Lost was them constantly creating new mysteries that they didn't have the answers too, and tying it up in the end with some random bullshit.
It's such lazy writing, but it seems like almost everything is written this way these days. Characters make the dumbest possible decisions, and refuse to talk to each other or share important information.