I didn't really "hate" any character, nor even dislike. I remember the mentions of fans' disfavor of Julian, but that was even echoed in the storyline.
I did come to not look forward to shows centered around Quark and the Ferengi stories, but even they had their moments.
Jake was never an irritant like Wesley was in those first-season episodes. Sisko took some getting used to, but he turned out just fine.
Early on, I had a hard time grabbing onto all of the Bajoran religion mumbo jumbo, but again, after awhile, it turned out just fine and added a lot to the overall story.