This is a harder question to answer than you think. In all honesty, can you blame or honor one man for all of this? My thought is this:
A president is only as good as the cabinet he has. His daddy told him who to have in his cabinet. There is no way that man is smart enough to have picked men like that by himself.
Yes, Saddam is gone and I think the world is better off for it. I do wonder how much stability was brought to the mideast by him since it would appear the fear he instilled did keep a strained, yet quieter region. I am on the fence as to some of the reasons that were given for his ouster. I am also very aware it is human nature to bitch rather than praise (ex: I love my new necklace, but did it have to be rubies?). So I will try to answer this as impartially as I can.
Bush came in with three strikes against him (His father, his wealth related to said father, and an election that made the US rethink the election process). I think Bush really did try to foster a non-partisan government and he was succeeding in "crossing the aisle" as it were. Bush was doing a great job on his own merit, he had a great advisor in General Colin Powell, and he had the respect of both parties which is rare for even the most popular president. Then 9/11 happened and the administration's whole focus changed.
The administration made some serious mistakes in how to handle Afghanistan, Iraq, Al-Qaeda, and the rest of the Arab world. Bush is a baby boomer who really isn't familiar with war (Yes, he can remember Vietnam, but it was a war of mistakes as well and LBJ made his fair share of gaffs in that one). All in all, Bush has done no worse or better job than his predecessors. He has had to shoulder the blame for the war, he has had his bipartisan dream shattered, and the unfortunate thing is that history will probably declare him "the man that screwed up the Middle East". I say that is not fair at all.
Bush has had to juggle a lot in his time at 1600 Pennsylvania Avenue. Family, Country, Political, and World. He is only as good as his advisors. Colin Powell bailed on him and I have often wondered if it was disagreement with his other advisors. He has had some highly visible failures with sone of his choices (Roberto Gonzales comes to mind now), but is that all on Bush?
So, I guess my answer is this. I don't see what is so wrong with Bush as much as I would ask is he getting the best advice from his advisors on the issues he is not up on. On his domestic policy, Bush has been pretty good, again, the Middle East issues overshadowed and derailed those policies and, in some cases, their enactment.
So do I want bush gone? Not necessarily. Do I want some of his cabinet gone? Absolutely.
Sorry 36DD if this offends, but I will say I love my country and I think the president has the toughest job around. I mean we put the target on some poor schmoes back every 4 years. That can't be an easy burden to bare.