IISc takes in the majority of students through KVPY so getting in through JEE or NEET is very challe being here. It’s very difficult to be among the top rankers here as you have to be among the top 0.05% (Reserved categories).
Despite all this, one of my cousins even in his under-deprived situation managed to make it into IISc. He was from a rural background a normal state board school and did not take any special tuition for JEE/NEET till class 12. He did not even have basic internet facilities and worked hard to procure study materials. All his struggles craved only one goal, IISc. And hard work does pay off!
Finally, he made it into IISc UG through NEET after spending a drop year. What he realized towards the end was that IISc was worth every second and effort spent!