What prosperity? Your situation turned worse in all aspects while the entire subcon region progressed you're just behind godforesaken Afghanistan in slowest growth in the region for quality of life non existent "massive development". I told you then it's going to be a non starter. Just like this, it's going to be another.
You engaging in conflicts with a country around 10 times your economy that has "full backing of Israel US Russia and rastafari saar" is the primary reason for your downfall. Naturally one would avoid conflicts with such countries whenever possible. If you think this supposed NATO is going to deter India somehow, you need to look back at the history of 1965.