I do remember people mocking DS9 and Voyager rather harshly, I wonder how my parent's old OfficialTMstar trek fan club group would weigh in? They used to discuss/debate the episodes while playing random games.
Yeah, I'm slowly making my way through DS9 at the moment and haven't thought about Voyager at all. Now maybe I'll give it a second chance (only saw it when it was on TV).
The issue with Voyager was that you could pretty much give any characters lines at the end of the show to any other character and it would still work. There was no real character arc, none of them grew. They were still basically the same people from the first episode.
Don't get me wrong, they did have some phenomenal characters (The Doctor), but overall, it was just... meh.
But hey, if you like it, you like it. It got seven seasons, so plenty of folks did.