[Xplune13]

India always had one of the biggest economies in the world before Industrial Revolution in the Europe.

Expecting anything to be "epicentre of good behavior" is wrong to begin with because every person is different no matter what any text/information/knowledge the person has access to and ancient India (as that is what we're talking about here) did have stable economies as well as kingdoms. Was it perfect? No, because nothing is.

India had pretty significant technological advancements and all you have to do is Google Search for it.

You have absurd definition of "anything of use". If you want everything to be perfect, then bad luck, there isn't such place to go for you.