I find philosophy to be highly irrational. It studies topics that are uniquely different yet it categorizes these topics as the same thing.
Aesthetics aka beauty is a philosophy, and so is logic. How do these things exist on the same level? Aesthetics is a human attribute and a human opinion and made up concept, logic is an observable phenomenon fundamental to the universe.
The infinite regressions are also pointless paths to explore. By induction we know it's infinite already so why continue to explore?