Snoke was just bad. Meat bags don't make good villains. Palpatine was an awful villain the second time around. They established two very solid villains in the first movie. Then they ruined them both. Snoke could have been compelling if they hadn't gone the weird leisure suit direction with him, and then just off'd him. Part of the issue is there was no real villain who felt imposing by the second movie. You didn't have a Vader or Palpatine (and even when Palpatine showed up, you didn't really have a palpatine------I don't know what that was, but it wasn't the terrifying figure in the first trilogy, it felt like the climax to a video game, not a space opera)