I don’t know if I fully understand why but I’m pretty sure it’s a lyrical issue. Like something about the rhyme scheme or flow of lines just gives me really intense “I’m in 4th grade and writing my first poem ever” vibes.
The music itself probably also bothers me but I don’t know music theory well enough to pinpoint why. Musically does it also sound like someones very first attempt at song writing? Or does it sound better than that which then makes the terrible lyrics really stand out?