Trek XI: A Romulan miner blows up a planet after he somehow finds himself in the past after his home planet is destroyed via natural causes in the future after the person who did everything he could to save his planet fails to save the planet. Oh, and he also wants to blow up Earth for some reason.
You'll get no argument from me that under both Berman and Abrams the series [save Kahn] has had a hard time finding decent bad guys. But at least ST X was entertaining. Nemesis was not.