If you're only refering to the Anakin of the prequels then I'd have to agree with you. But the Darth Vader of the OT (esp. ESB!) was perfectly capable of ruling the galaxy.
You see, they're two completely different
characters. Prequel Anakin was a friggin' idiot
that totally undermined the character of Darth Vader, IMHO.
Yet another reason why I despise the prequels with every fiber of my being.
"They should rename the team to the Washington Government Sucks. Put Obama on the helmet. Line the entire walls of the stadium with the actual text of the ACA.
Fix their home team score on the board to the debt clock, they can win every game 17,000,000,000,000 to 24. Losing team gets taxed by the IRS 100%, then droned."