I agree that Bush was bad in a lot of ways. However, if you think he was worse than Carter, then you must not have lived through the Carter years. (at least not as an adult). The big difference maker for me is that Carter left this country weaker in every possible way than when he found it. The same cannot be said of Bush.
We are not militarily weaker. (Though we need to replace equipment and refit). We are not weaker in foreign policy. (Though our voice and focus needs to be changed in tone and tenor, but we come from a position of strength).
Our economy is weaker, but it is not as weak as 4 crippling years of stagflation with double-digit unemployment, 21% interest rates and an inflation rate of 18%. This country was one-half step away from banana republic style hyper-inflation.
So, no, Carter still wins for being the worst president ever, it isn't even close.