The Dukat/Kai Winn sequence was vapid, vacuous, a little nauseating, more full of plot holes than a gruyere cheese and apparently on a extremely dilated timeline compared to the rest of the events. Meanwhile the Dominion are overcome in the most anodyne and dull manner possible, considering their power, intelligence and resourcefulness. Meanwhile everyone else is playing gangsters on a holodeck. To say the end of the last season was a mess is an understatement.
The end of the last season is my favorite part of the entire franchise, so to say I disagree with you is an understatement.
I'm not going to bother defending the Dukat/Kai Winn sequence because it's been discussed to death and it
obviously had its flaws; anyone claiming otherwise is oblivious.
Not sure why you think a battle over Cardassia is so bad, though.