The fact that everything he has done has failed I think is less a testament to his incompetence and more to the power of Corwin's curse. The wording in S2M6 is:

>By my Will and by my Power,
Birthright from my divine Mother,
This is my command:
May you never know completion
May you never know achievement
May you never know success:
But always frustration
Always shortfall
Always failure.<

That's pretty well got the deck stacked against the man in terms of him actually being able to succeed, but the fact he's hanging on as well as he does is rather terrifying.

"This is probably a stupid question, but . . ."