wow.. don't tell a writer what to write
Think the ratings went down in Denmark because it aired at sunday afternoons and later a competing channel had a row of similar series in the same period of time.
My brother used to watch Xena and Hercules while I was looking at Angel and Buffy at the other channel. Sometimes when reruns where show one of us switched to the other channel.
Xena aired for a long period of time. I think it lost viewers like most other series does when reaching a certain age.