Struggling to find an investor who's willing to fund a no bs 'revolutionary' product.

I am currently studying for an exam called UPSC CSE which is used to pick the Civil Servants of India. Only 900ish clear the exam out of 0.5 to 0.8 Million applicants (<1% acceptance rate). The cost for coaching is $1.5K/year which is a huge sum in India. I built a product that provides the same quality content for less than $50 (it's possible to do this, but many don't dare). I pitched this to over 50 people (common people and investors), but none believe in it. I am disappointed.