If we just ignore the aesthetic of Picasso's art, you can categorize Picasso as a genius purely on his influence of other artists that follow him. It's possible to dismiss his influence by saying those other artists are fools or deranged. However, Picasso's influence is undisputed and absolute. Purely on that metric, he is classified as a genius. My hope is that anyone who is reading this will ask "Why is Picasso influential?" instead of "Why would anyone like this?"
It is possible to dislike Picasso and appreciate his influence on art.