Lacking a brain is harsh, more accurately he lacked any level of composure. He is/was also very technically clean - decent ball carrier and a really good passer, yet managed to make himself look so awkward and lumbering, and that’s even before you get to his defending https://twitter.com/freddiepye_/status/1292961698517790721
His talent was evident, just look at his good games, you can’t look THAT good without talent. I don’t think he was a particularly poor reader of the game defensively or had poor defensive instincts, he just lacks any and all composure. Made him rash and a terrible decision maker.
He looked like a child in an adult’s body sometimes. Don’t know if it was confidence or nerves or what, but he just looked like he didn’t have total control of his coordination, which is so strange for somebody that athletically (and technically) gifted.