If things were improving "exponentially" like you claim, our lifespan would be accelerating and these "miraculous" treatments would allow us to live 100s of years. What's actually happening is our lifespan is not increasing, and in some years has been decreasing.
>>maybe you're depressed
But if these "miraculous" "exponential" medical improvements were real, we would expect to see less and less people who were depressed every decade. Instead, depression rates have been increasing.
One might also suggest if the world were DRAMATICALLY better as you claim, depression rates would be going down, not going up.