That is because India is far behind in terms of technology and education and hence the average Indian you find for your project would always be working more hours and he would have less technical/coding skills because of the education gap and while Indian guys would work for cheaper prices they would always take more time which basically means the work done is the same.

I have seen some amazing guys from India so can't say that everyone is bad and in fact Satya Nadela the CEO of Microsoft is Indian but that is only because he is born in India but took his formal education from US.