I can't think of a single TV series, movie series, entertainment series, etc, that didn't have a worser and higher point. That's just the way it is, for some reason. Kinda like how you can't have light without darkness, or good without evil.
Either something starts good and gets worse, or starts worse and gets better. It's just natural, I think. The more I think about it, the more impossible it seems not to have a worse point.