"This is the worst course in the school."
Translation:Este es el peor curso de la escuela.
So if peor and mejor directly affect a noun in this way they come before the noun? As in, it's "el peor curso" not "el curso peor"
I honestly don't know. Not everything in any language will be logical. Maybe peor and mejor are "special" in that they can be adjectives, adverbs or pronouns.