This robbed the GOP of having a leg to stand on in regards to being a "conservative" party, a party of small Governments. General voter maybe completely naive and without understanding of issues, but they do tend to see that there is very little difference in effect between GOP and Democrats (especially with the MSM help).
So the bottom line, was Bush a good President? The answer to it must be said as "NO". He allowed far too much to happen under his watch that undermines the values and stated purpose of the Conservative agenda.
Now if we compare him to obama? Well in that case he is the best President we ever had, but that sets the bar awfully low. Especially given that without Bush there wouldn't be obama.