This song isn't actively bad. I wouldn't mind it in the background. But as far as I can tell, it doesn't really utilize "jazzy" chords either. It's just kind of gentle and peaceful and doesn't ask for too much attention. I wouldn't use this as a good example of Jazz music.

What I'm referring to as what sounds awful are songs that try to use "creative" chords that are really just dissonant or don't belong together and "advanced" notes that are really just out of key. As far as I can tell this song isn't doing that.