But...Voyager's ratings weren't holding strong. They were declining exponentially every season.
Voyager had a habit of focusing more on making an exciting commercial than actual good writing. The episode with The Rock is the biggest example of this, that episode got much higher ratings than most episodes that season, but the viewers who tuned in to see The Rock didn't tune in the next week. All Voyager seemed to really care about was what would get people to tune in that week, not what would cause long term fan loyalty. Even though the show was more accessible than DS9, DS9 had consistently higher ratings, because it did more to establish fan loyalty.
TNG on the other hand was so successful because it managed both. It was accessible and knew how to write a good commercial, but also knew what kind of writing would create fan loyalty.
And Enterprise's first two seasons were far worse than any other Trek's first two seasons.