Neo-brutalism is an interesting and paradoxical classification. Working with concrete can be great and very much necessary in modern architecture. I certainly wouldn’t write him off just for using concrete and post brutalist vibes.
I would say the biggest problem here is the site. If I had the luxury, I would have refused to take this commission as a creative architect. There are too many constraints here. But maybe he just took the money, and if the client pays, fair game. Actually, it’s not clear to me if it was the previous owner who had the building commissioned, and Kanye just gutted it?.