The truth is Novak has nothing to be ashamed of. None of the finals he lost was due to him being weaker player but due to outside unfair factors.
1. USO 2007 - Choked in the first final - quite normal thing to do. Was better player in the first two sets but failed to convert 7 set points.
2. USO 2010 - Exhausted and unfocused after epic SF vs Fed, while Nadal was fully rested after extremely joke of a draw and even bigger joke of the SF.
3. FO 2012 - Rain. Nadal bullied the umpire to stop the match after losing 8 games in the row and being totally humiliated. The match should have continued.
4. USO 2012 - Wind. Was better player than Murray but lost first two sets due to wind and was exhausted at the end in the 5th.
5. FO 2013 - Pascal Maria. Nothing else needs to be said. Not a final, but de facto final.
6. W 2013 - Demoralized Novak could not go vs whole country and didn't even try to compete properly in the final. Also was exhausted after another epic SF he had to endure, while Murray was cakewalking to the final.
7. USO 2013 - see USO 2010. Also Nadal's dirty tactics from Montreal and Novak still feeling Pascal Maria's injustice payed off for Nadal unfortunately. Novak was UE machine in 1st and 4th sets due to that.
8. FO 2014 - Sickness. Throwing up all over the court due to stomach flu.
So none of the loses were because Novak is unstable, or not being able to compete in finals, or him being lesser or weaker player. All loses were due to bad luck and unfavorable and unfair circumstances. Nothing more. The luck and justice have to turn at some point and the time is now.