I thought it was pretty brilliant how the dream Ray had after getting shot in the second episode, the one with his father telling him how he'd die all came true in the final episode. The show was very subtle, and very slow. Two things a lot of people just hate. For me, I just sat back and enjoyed it not being a retread of season 1 at first but I was never lost and the show made perfect sense to me.
And yes, the men with power and money got away with it, for a while. The entire point of the ending was that they did NOT get away with it. The reporter will publish a massive expose and bring them down. Bezzarides, Jordan, and Nails together at the end working their revenge from the shadows was a great non cliche ending. It was inferred they were not really done with their work though. I guess people needed to see Burris and Tony Chessani get riddled with bullets to feel the vindication though. But I didn't. I liked how they wrapped it up.
Frank's death was his own karma coming back to haunt him. Literally. There was never going to be any big redemption for these characters, and they were never going to make it out of the season alive. This was all foreshadowed. Frank's redemption was saving his wife, getting her out alive, and giving the bar to Felicia. And killing Osip and McCandless was just something he had to do. They wronged him on a spiritual level.
Velcoro seeing his son with his Grandfather's badge was his redemption. The small interaction they had was his big win. The whole season all he was trying to do was make a meaningful connection with that kid. But it wasn't going to happen until after he opened up to another human being. Bezzerides. He finally saw that he meant something to the boy.
I thought the couple of shootouts were pretty well done. There was no easy out. The "evidence" on the recorder in the train station getting smashed made me smile. That was a good narrative move to keep the audience feeling hopeless, as I'm sure the characters would. It's such a cop show cliche to get the big confession on tape. It was nice to see it smashed, literally.
The whole season had that though. The cop show cliche getting tipped on it's side.