He didn't know how to play basketball at this level. There's a difference between what you do playing hoops with friends or at a park and what you do at a high level. Sometimes people who can play well in the chaos of, say, a park, can look good for small stretches, particularly if they're high energy. Some people liked Kwint last year. Some people like a guy or two this year who don't play. But those guys don't actually know how to play basketball at a high level (understanding rotations, off-ball stuff, ball trajectory, etc. etc. etc.), and so couldn't stay on the court for more than a few minutes.