I am not a rationalist because the universe is not rational.

Hint: just because you can write it in a provable equation doesn’t make it rational. Quite the opposite! Equations only encapsulate what is or can be. Neither of those things have to make sense, and often they do not. For instance, Bell’s theorem doesn’t really make sense but it appears to be 100% true.

If that’s rational, then rationality has a lot of explaining to do.