Was Dr.Manmohan Singh tenure as PM a failure?

Why is Dr. Manmohan Singh respected and rated as the highest qualified Prime Minister in the World? Whereas we Indians criticize him as a failure and the reason for Congress debacle in elections. Well! there are various factors into play and a lengthy debate. As my personal view I will analyse a few in short. Firstly, I believe an intellect is always an intellect. Similarly, Dr. Manmohan Singh's intellect cannot be questioned or disputed. Secondly, many question him as not a capable leader. 

India does not need a good leader because all the inputs provided to the PM are from the bureaucrats. He only should have the capabilities of implementing the inputs. Dr. Manmohan Singh is a scholar who is recognised the world over. We know how Dr. Manmohan Singh saved India from the brink of bankruptcy in 1991 when India had hardly a little over two week surplus for imports, that compelled us to pledge gold. With his policies and reforms we are today more that self sufficient in foreign reserves. India reached the status as a world economic power house and the third largest economy in the world.

Even during the world economic recession and global meltdown where most of the world's top economies were shattered, Manmohan Singh held the distinction of keeping India's economy intact. So, what changed his intellect suddenly, that he is now labelled not a good leader? As a PM during 2004-2009 UPA rule, Manmohan Singh raised India's average growth rate to around 9% which is credible. It was only during the past 5 years after BJP could not digest their second term Lok sabha loss, they hatched a conspiracy to dethrone the UPA Government. 

All the reforms or policies brought out by the UPA were opposed by the BJP with no logic or a will to compromise or resole for an agreement. Hence, the BJP stalled every policy of the UPA during the past 5 years by frequently disrupting Parliament. In fact, Leader of the Opposition in the Lok Sabha Sushma Swaraj said that it is the BJP which would decide “on a daily basis” whether Parliament would be allowed to function that day. The PM was not allowed to speak or implement his reforms and policies. He was on a daily basis accused of scams and forced to resign at least 100 times. So, how can one expect Manmohan Singh to be efficient if not allowed to perform? 
Also, the other reason was that the PM was running a coalition government and was handicapped with coalition compulsions. Thirdly, he was running a minority government and had to depend on the support of other parties and opposition to push through reforms. If not, we know how Mamta Banerjee of TMC withdrew support from the government, making the PM task all the more difficult. And lastly, we had a non co-operative opposition whose only job was to oppose every policy or reform at the cost of the nation economy.