The whole show is a genre piece, (Mann, is in a sense, a genre director) but the last several episodes went too far into those cliches, and didn't sink the show, but put some holes in it. Some of those scenes were rough, and not in a good way. Too on the nose, too much swaggering sociopath villain, too much goofy white antics. It lost the touch of the first episode, which carried mostly through 5. It was the last two that felt the weakest.
And the pilots first sequence was never circled back to, and honestly feels like a different show. I think Mann (or whomever) probably had a lot of notes from the studios, to include some of the weaker stuff, given the relative quality of the first episode, compared to the last. Some of those sequences were like writers workshop at first year film school or something. Stuff I came up with when I was a child.
The finale felt written like a show hedging it's bets, on being renewed, but not certain of it, which hurts it creatively, because it had less weight to all it's punches, and doubles down too far on sleaze Netflix C list thriller tropes like a video tape of a murder, and the speech in the warehouse. That was poorly done.
Loved it, as a whole though, and especially the first 5, which are some of the best TV episodes in awhile, for me, in it's genre.
That Yakuza ritual in the first season was one of my favorite TV scenes in a while.