Complex sentence: After a strong premiere, "Enterprise" had grappled with declining ratings throughout its run; by the fourth season, fewer than three million viewers tuned in each week despite what some fans and critics considered an increase in episode quality.
Split into simpler sentences: After a strong premiere, "Enterprise" had grappled with declining ratings throughout its run. By the fourth season, fewer than three million viewers tuned in each week despite what some fans and critics considered an increase in episode quality.