Boring, disjointed mess.
It's ok to try story telling in a non linear way, but jumping from so many different time frames made it difficult to follow. Also the different actors who played Diego had very different styles of acting, which is bad, because they are playing a real person, so well known around the world that i can't understand why none of them could get the job well done.
As for the series itself, think of a Thanksgiving dinner in which you have a perfect recipe for turkey, but there's so much stuffings that by the time you make it to the main course nobody wants to eat it. In here you have all the ingredients, but there's so much that even the important parts got lost.
I don't think I'm alone in the critics because i don't see many people writing any reviews.
I don't know what they were trying to convey in the series. But, if you are going to make a point with full frontal nudity, at least be consistent about the main character being circumcized or not. We all looked there. And you know it.