That's the trick. Enterprise could've owned wednesday nights, with the exception of Smallville, there was nothing to attract the almighty 18-30 demographic, all they had to do was move it an hour. On friday nights however, it's competing against JAG, SG-1, and a couple of others. It's downright dumb, because these shows were established in their timeslots and were basically a Juggernaut, against which Enterprise with it's floundering story and somewhat earned rep for not being particularly entertaining, couldn't win against in the continuous battle for that almighty 18-30 demo.
If they moved it back to friday nights, it could own.