I'm starting ep 6 and have to agree that it gets better. Scott Buck was the sole writer of the first two episodes and as soon as he handed over primary writing duties to other writers I started to notice an improvement. The supporting characters became more rounded and for the most part the amateurish dialogue went away. Colleen especially is really getting to shine. The visuals also improve somewhat (not sure about the reasoning there), though it still doesn't look as good as DD or LC.
I still feel that the show is focusing on the wrong things, though. And that Finn Jones isn't a strong enough actor to carry a show. There are times when he'll say something meant to be sweet or gracious but he comes off like a dick. It isn't an intentional character trait, either--the other characters react as if he's being gracious. There's just something off and vaguely condescending about Jones, at least to me.
Episode 6 seems to introduce the Immortal Weapons (I forgot one of them is obsessed with spiders... oh joy) so hopefully the show will head into more interesting territory soon. Iron Fist vs heroin dealers, even if they are backed by the Hand, isn't cutting it right now.
EDIT: Another problem is that the show is repeating a lot of the same territory from Daredevil. The show needed to differentiate itself immediately and it failed, and is still failing, to do that.