The seventh season doesn't suck. The first half is wobbly (when I was watching the show, I got really worried they would totally botch the Big Finale) and the last half is much better. They pulled off a great final run of episodes to wrap up the Dominion War in style. Some of the stuff like the Worf-Ezri-Bashir love triangle and the Dukat-paghwraith thing was weak, but the stuff with Kira, Odo, Damar and Garak was golden.
Really S7 is no worse than the show on average. S1 was much worse, with only four watchable episodes for the entire season. DS9 had great stretches and great episodes but in any given season, you can see big problems. Its only "golden season" without any significant problems is mid-S5 thru mid-S6 and that's not really a season unless you cheat.
Actually, I wished they would have continued DS9 past the seventh season.
Ah nostalga! I remember how I wanted the Dominion to win the war and then S5 would start immediately with Star Trek: Resistance. And Voyager could arrive back in the AQ after the first two years and get in on the fun, by merging the survivors of the DS9 cast and a whittled-down VOY cast (I'd have kept Tuvok, Paris, B'elanna and EMH, and killed everyone else off in the initial Dominion attack on an unsuspecting Voyager, which had been blissfully expecting a hero's welcome, unaware of the changes back home).
Some Niners were up in arms about this notion, being savagely anti-VOY and all, but I was willing to be open-minded about it for the good of Star Trek as a whole. Who wouldn't want to see Kira and Paris or EMH and Bashir? Cmon, it could have been great fun. And to make the premise work, you really do have to go thru both shows' casts with a chainsaw, otherwise you don't have credibility.
I'd have merrily killed off, oh, Rom, Ezri, Jake, Worf, and O'Brien, and made Odo one of the enemy, hee hee. That would have shaken everyone up some. Keep Kira, Bashir, Garak and Nog. Quark would be a collaborator but with suspect sympathies. Sisko's off with the Prophets and out of the picture. Kasidy and the kid are in hiding. The Female Founder, Damar and Weyoun would still be in the story, and as for Dukat, eh. Maybe I'd have killed him off, still, in the DS9 finale.