Murray has made 10 Grand Slam Finals, which has included at least one final appearance at all 4 Grand Slam events. The fact he's won 2 and lost 8 is down to the fact that, in all 10 appearances, he's played either Djokovic or Federer, 2 of the best, if not THE 2 best players ever. Add Nadal into the mix and Murray has been unfortunate to be at his peak at the same time as some of the best ever were/are at their peak. Federer has won 17 grand slams, Nadal has won 14 and Djokovic now has 12. If you look at some of the best historically there's only really Sampras that comes close volume wise, Edberg, Becker, McEnroe, Connors, Agassi, Lendl, none reached double figures. Since the start of the 1970's there's only Sampras, Borg and those 3 that have won 10 or more Grand Slams, so that just shows you how high the quality of Murray's opponents has been. Drop Murray into the Hewitt/Roddick era, 10 years before he reached his peak, and he'd have won far more than just the 2 Grand Slams.