This.
Of course it’s been brought up multiple times before…
Why does the interest rate affect higher and lower order goods disproportionately?
Consumers’ time preference – how does it affect interest rates?
Also see here. Particularly here.
In the future you might actually learn something about what you’re talking about before making claim about “problems” with it. Or at least ask questions instead of making ignorant accusations. (or how about just running a search? I even created an entire post just listing the threads on interest rates.)