A lot of times.
Every 2010 slam.
Every 2009 slam that Rafa played.
Every 2008 slam.
AO 2007 (Murray didn't play RG or SW19)
2010 UO - Murray in Nadal's draw, Murray lost before the quarters, Djokovic went on to beat Federer in that tournament and had a shot in the final
2010 W - Murray in Nadal's draw, Djokovic reached the semis as well
2010 FO - Murray in Federer's draw, lost early, Djokovic lost just before he was to meet Nadal
2010 AO - Murray in Nadal's quarter, beat the Spaniard in straight sets but wait, surprise, Federer beat Murray in straights in the final
2009 UO - Murray was the no 2, he got Nadal in the draw but ONCE AGAIN he failed to reach the semis, Djokovic reached the semis to play Federer
2009 W - no Nadal in the tournament
2009 FO - Murray in Nadal's half, both failed to reach the semis, Djokovic failed too
2009 AO - Murray in Nadal's half, yet AGAIN failed to reach the semis, Djokovic lost in the quarters
2008 UO - Murray in Nadal's half, beat the Spaniard but AGAIN, surprise, went down to Federer in straights
2008 W - Murray in Nadal's quarter
before that doesn't matter
So it's not like Nadal gets Murray every single time. Also, Murray often underperforms (out of the last 6 hard court Slams he failed to reach the quarters 4 times!) whilst Djokovic is constantly a threat at the US Open (2 finals and 2 semis since 2007 are excellent results + a 2008 AO win and 2 quarters)
So since 2008 it's Djokovic far ahead Murray in hard court slams.
You're crying because Murray has found a solution to beat Nadal on hard courts whilst Federer doesn't mind playing Murray or Djokovic in Slams.