While this is true you can't fault the guy as he was just fighting who was put in front of him in Pride. There were a lot of filler fights, but there were also some quality opponents in there. My criticism is that he didn't go over to the UFC. Yeah he fought top guys in Affliction and Strikeforce, but there were also Top fighters and future top fighters that would have looked better in the long run.
People say that all of the top HW's were in Strikeforce, but that's not necessarily true. The UFC had top HW's too. Cain, Mir, JDS, Couture, Brock, and Carwin were all fights that could have been made. Cro Cop and Nog were there as well. I blame Vadim. He never had Fedor's best interest and in the long run hurt him legacy wise and financially.
Even though I consider Fedor the HW goat he was always a beatable fighter and I think Stipe, DC, and Cain all had the tools to beat him Prime for Prime. Fedor's style was also more effective in a ring vs a cage as well.