How much evidence is there that supports the solutrean hypothesis?

the distinctive spear points that are associated with the Clovis people date back approx. 13,500 years. Further, they are found with increasing antiquity toward the north-west ... away from presumed Spanish influence.

i conclude that the "solutrean hypothesis" is complete nonsense. My suspicion is that, 13,500 years ago, what we now call Spain did not have an ocean going culture of any kind.

Nope. The points are only vaguely similar. If the hypothesis weren't the pet theory of literal Nazis the academic community probably wouldn't be so dismissive of it, but there isn't evidence for it. It's just not impossible. Even if there were some Atlantic crossing of people, none of their descents survived (known from DNA testing) in native people.

eta: It should also be pointed out that 20,000 ya Europeans weren't white.