Voyager is alright. It’s just very uneven. What drags it down is that the producers only very rarely took big swings that had a lasting impact on the characters or the show. Voyager excels at being episodic television. There are a bunch of stinkers (as there are on any TV show) but when it’s good, it’s really good. It has some of the best Trek episodes.

Maybe use an episode guide with ratings (for example Jammer’s Reviews, Ex Astris Scientia or IMDb) and skip the episodes with low ratings.