Hindu rulers were busy fighting Muslim invaders...Hindu rulers before the coming of Muslims built some excellent world renowned universities like nalanda and takshashila.Those were burnt by Muslim invaders
You madarsa educated bigot,where did you learn India was never a bright place?it was home to some of the oldest civilsations like harappa and mehrgarh civilizations..when you Bangladeshi mongoloid and negroid tribes were roaming without clothes with arrows in hand,we built excellent temples whose engg skills are marveled even today ...we are the inventors of zero...we were the masters of high standard philosophy...we were the people who wrote first grammar book...we were the ones who gave Buddhism to the world..we were the ones who gave numbers to the world...I can go on without a stop...yeah ,for you ,a Bangladeshi ,who were living in jungles even 2000 years ago,Islam might have brought some civilization...we,Indians ,were far ahead in every period of history.
If India didn't have anything why the FCK did those Muslim rulers come in hordes one after the other to India?India was always the most sought after place for every king across the world for its riches...Columbus discovered America accidentsally in his quest to discover India...go and learn the history.