No, of course not.  Incompetent?  As far as dealing with the entrenched bureaucracy at the VA, and the IRS, and at ATF, and at DEA.  Maybe.  In each one of those there were scandals and he claimed to know nothing about any of them until he saw it in the Washington Post or the New York Times.

IRS targeting of conservative 501(c)3 organizations.
ATF's Fast and Furious 'loss' of over 700 firearms, two of which were involved in the death of a Border Patrolmen.
DEA's selling of illegal cigarettes to finance its own investigations.

Each and every one of those he was like Schultz:  "I know nothing!"