I don't doubt that he is a smart guy.
My issue is that we had a team that was so close to the world series and instead of trying to build on that and get us to the ultimate level the team has gotten worse each year. I can understand if a team is crap and it takes time. I got the feeling, starting when he forced AA out, that he wanted a team that he created all by himself/in his own image, without having any, or hardly any pieces from the previous regime. I think he has a big ego and does not want to share credit with anybody else.
So, yes. I immediately disliked him when the first thing that happened was him essentially forcing out the face of the franchise, AA. Fresh, bold, the players trusted and rallied around him, but shapeero did not want him around because of his (my speculation) ego. So now, it took him 3 years to just break down the team. Now, how long to build it back up?