Sound quality and compositional quality are completely independent.
music is composed of rhythm, melody, harmony, and timbre. timbre and sound quality are connected, and you already said you liked the melody so...what about the composition is bad would you say? you like a very similar arrangement of the same melody so it would appear that your biggest beef with it is the corny lyrics, which is less of a musical issue and more on the games script writers(and is a consistent problem throughout all of final fantasy, not just the musical parts)