Five out of those six seasons we were out of the title by Christmas (If I am right in saying), often earlier.
OK the first season I will let him off as he needed to build a new side. But the other five, one title challenge in six seasons - sorry not good enough IMO given the players he inherited.
I didn't expect us to necessarily win the league, but we only had one title challenge - it was not good enough IMO and I don't think he ever 'got' the league, we were too cautious and it cost us season after season, even in 2008/9 it has been argued it was the difference between a title and a challenge.
I think your expectations were too high. You could say that he inherited some good players (Gerrard, Hamann, Owen) but seriously if you compare them to the top 3 at the time, we were clearly very far behind. Arsenal had gone a season unbeaten and had players like Campbell, Cole, Vieira, Pires, Henry, Bergkamp. Man United had Rooney, Ferdinand, Neville, Ronaldo, Scholes, Giggs, Van Nistelrooy etc, Chelsea had Cech, Carvalho, Terry, Lampard, Makelele, Robben, Drogba etc. In addition to that their squads were a lot stronger than ours. We had very little pace or balance in the side, very few quality players and a squad that was very very far off being a title challenging squad.
2005/06 we finished with 82 points and came third, two places better than the season before. Yet still we didn't have the financial power to be able to put forward a genuine challenge. Personally I feel that Rafa possibly concentrated too much on the squad rather than first choice players but even then we were still improving without the financial backing. Then, after the first transfer market under H + G where Rafa was backed but Parry was still messing up transfers, he started to have his hands tied behind his back again. Yet we still, with the fifth highest net profit and the fifth costliest squad and the fifth highest wage budget, came 2nd in 2009. I don't see how you think Rafa could realistically have challenged for the title every year.