I couldn't watch it. I might have gone through ~five episodes of S01... And it's not just this show; I couldn't watch more than a season or two of other popular dramas as well (Empire, OITNB, Better Call Saul, Mr Robot, etc)
Best show where most cast is black? For me it's ATLANTA! It's the only reason I haven't committed suicide yet. That and the over-9-year wait for the sequel to James Cameron's Avatar.