<human>: Give me the gist of the text in a nutshell

I started watching Dexter last year, and because of an injury spent a good deal of the summer watching episodic dramas such as the above listed. Now that Season 5 has started, I'm starting to find myself more and more questioning of the quality of Dexter as a Drama. 

I find that the characters are more one dimensional, and the plots way too straight forward and predictable. I'm also increasingly aware of the sheer implausibility of some of the events in the show; tampering with evidence like it's nothing, leading the other characters by the noses, the convenience of how Dexter can slip through any net and go right back to killing. I also have to cringe and bear it when in place of strong character development we get speeches about the Dark Passenger, and how he's so burdened.
<bot>: Especially after M.C. Hall's brilliant role in 6 feet under, I'm finding Dexter underwhelming. Thoughts?