Now that you mention it, yes. The characters are quite 2 dimensional and unlikeable (not all, but definitely important to mention).
That being said I thoroughly enjoyed the books and didn't stop too much on the characters. Under unlikeable, flat, awkward characters there was an interesting premise and good thinking to be had: living in a society that has no private thoughts; dark forest theory, life in a society after the end.
So what I did was take a big sip of suspension of disbelief and enjoyed the ride. The interest to see the conclusion of the story was enough to coast through all three of the books.
Also, I read those just before the hype. I first heard of the first book a few years before from an Adam Savage podcast and the premise stuck to me. So after reading the Witcher I wanted something sci-fi'ish and this hit the spot.