"for someone with his ability he should have won a lot more"
OK, so he hasn't won a major - yet. But what do you mean when you say "a lot more"?
Here are a few of his career highlights. (Not all of them either).
Although much of 2005 was spent away from the course, the Ulsterman nevertheless managed to notch six top ten finishes in 14 European Tour outings on his way to 20th on the Order of Merit. Also successfully defended his Mitsui Sumitomo VISA Taiheiyo Masters crown in Japan at the end of the season to maintain his record of having won somewhere around the world every year since 1998. In February 2000, he became the first European golfer to win a World Golf Championships event, capturing the Accenture Match Play, beating David Duval in the semi-final and Tiger Woods in the 36 hole final at La Costa Resort and Spa, before becoming the only player, apart from Woods, to have more than one WGC success to his name when he won the 2003 NEC Invitational at Firestone Country Club. Not a stranger to ‘firsts’ however. In the 1999 Smurfit European Open he became the first player on The European Tour to shoot 60 for a second time, having achieved it first in the 1992 European Monte Carlo Open – and owns a car registration DC 60 in reference to those rounds. In 2001 he became the first Irishman to win on home soil since John O’Leary in 1982, when he captured the Smurfit European Open, and in 2002, became the first player to win the English Open three times. Has also been part of a winning European Ryder Cup Team on three occasions, the most recent at Oakland Hills when he claimed three and a half points out of five. Helped organise a special Pro-Am at Portmarnock in September 1998 in aid of the victims of the Omagh bombing tragedy. Played in, and won the inaugural Benmore Developments Northern Ireland Masters on the 2003 Challenge Tour and donated his €35,877 cheque to his own Darren Clarke Foundation, to help further the development of junior golf in Ireland.
Sorry - but again, I disagree with you. I think he's a very successful man.