I can't even put my finger on what was the issue with it specifically. But the fact that I endured S2 and couldn't make it through S3 should tell you all you need.

They got back to actually adapting source material, but made it more stupid. The characters were just destilled versions of themselves, there was no depth.

I gave up after the Thanedd episode where they were acting like there is this grand plan that they slowly uncover for you, Ocean's 11-style - they tried to actboh so clever but it was just so not clever they made themselves look stupid.