I guess I'm the opposite. I love DS9 so I can sort of forgive the ending.
I thought DS9 was... alright, but I really hated that ending. I didn't like where they took odo, I hated how they used Sisko's "chosen one" status, everyone kept telling me Worf was going to be some badass but he gets his ass kicked almost the entire series. Funnily enough, my favorite characters were Obrien and Quark's nephew. That episode about Obrien going to the mind prison that's kinda like a very dark version of Inner Light crushed me.
It was at least better than Voyager. I'll take any chance I can to bring this back up: JANEWAY KILLED TUVIX. And, perhaps even graver sin, in doing so, she resurrected Neelix. Unforgivable.