There's a difference between action that serves the purpose of a character story arc and action that's just thrown in to be gee-whiz cool. The action and villain in STII served the story of Kirk's inner character conflict, his need to always win vs. his inability to face the consequences. The events of the story perfectly illustrate the inner character conflict. The only purpose of the Borg action in FC was Trekker fangasms.That Trek fans don't want an intelligent coherent SF story, they just want slam-bang action, with cool cameos like Kirstie Alley and a 1-dimensional original series villain.Apply it to any Star Trek movie you dislike (except TMP or TVH), it's easy.
In TWOK, we get a story which over the course of the movie reveals the key to Kirk's character.
In FC, we get Captain Ahab from Moby Dick standing in for Picard. A guy who's willing to sacrifice everything, including his crew, for personal revenge. Given everything we've ever seen about Picard in all of TNG, I found this conflict completely unconvincing and, like every other aspect of the movie, simply tacked on to tell a made-to-order, paint-by-numbers story. Furthermore, whereas every aspect of TWOK hinges on Kirk's story, indeed Kirk's story is the spine of the film upon which everything else hangs, Picard's little Ahab bout is treated like a seperate b-story.