I am an indian too.
I consider Modi to be a useless, corrupt, duffer of a Prime Minister with no role in India's economic growth. His regime will be known as the "lost decade" of India where it failed to seize the momentum and even damaged India's economic prospects with his idiocy that also pushed a lot of people back to poverty.
However, India's economic development under capable governments are just as visible as the poverty that remains. PM Nehru laid a solid foundation for our country's democracy and created the foundational infrastructure for manufacturing, defence, and scientific research. PM Shastri and Indira Gandhi focused on self-sufficiency in food production and India today is the largest producer of grains, oils, vegetables, milk, livestock etc. etc. that it can feed its 1+ billion population. Indira Gandhi boosted our military and gave extraordinary impetus to our defence, space and nuclear industries. Rajiv Gandhi focused on creating the foundation for India's electronic and IT infrastructure. PM Rao, based on the plans of his predecessors, implemented the policies for private enterprises to thrive. Dr. Manmohan Singh created and implemented one of the largest rights-based welfare scheme in the world to reduce the wealth-gap in India, while fostering economic growth with a focus on services. During his administration, and due to the continuing momentum of the economic growth that he nurtured 270 million indians were lifted out of poverty between 2005-6 and 2015-16 – the most in a global study of 75 countries ( https://www.hindustantimes.com/india-news/india-lifted-270-m... ). (I suspect Modi's policy have sent half of them back again to poverty).
It's all easy to say that economic growth happened only from the 90's. That belays an understanding of both state craft and indian history. We chose to focus on building a sustainable and strong nation-state because of our colonial history, at the expense of faster economic growth (and an emphasis on ensuring everyone benefited from the economic growth). On the other hand look at South Korea and Japan. Their economic policies were certainly better than ours at one point. But look at other aspects of their state - they are even today totally dependent on the US to safeguard their borders and thus having to sacrifice some of their sovereignty (on foreign policy) to the US. Korea even has had a history of military rules.
My point is that everything is not as simple as it appears and you have to consider the whole system - due to our democratic system and our huge population, we are operating on whole different level compared to the rest of the world. We have actually done quite well with the handicaps we have ...