Why would there exist a designer pre-existing existence that which specifically designed human reality? It's nonsense.
However, ignoring this technicality and instead focusing on what is actually meant by "intelligent design"--that reality around us is an intelligent and purposeful blueprint...
I'll conjure up an image I've used to make a few different points:
Ignoring all evolutionary reality, there is a massive amount of evidence that humans are 100% a pre-encoded blueprint. Five fingers, five toes, symmetrical...
Now I wouldn't say this evidences "intelligent design", but I would say that perhaps "humans are innate and pre-encoded in time and mathematics itself".
Which is a quizzical concept in the face of evolution. Yet, somehow, I think it remains absolutely true. Humanity as we know it is a pre-destined entity.