Carter:
Malaise
Stagflation
Energy Crisis
Rejection of the Shah
Supporting rebels in Afghanistan (I realize Reagan continued this policy, and it's a black mark on his record, also.)
Budget Deficit
Inability to manage and delegate.
W. has been pretty bad, but Carter takes the cake, in my opinion.
Rejection of Shah? Hahaha. Actually, not admitting him to the U.S. was pretty smart move and avoided additional troubles. Carter cannot be really blamed for Iranian revolution, as it was a consequence of politics impaled by the U.S. since Ike.
Budget deficit: Compare it to Bush one, ok?
Afghanistan? Lol, I thought you conservatives were so supportivbe to "freedom fighters".