While I like all the songs in La La Land (well, except the John Legend one), its strengths are more in the score than in the songs, as opposed to, say, Moana. Or, for those who like crappy 80's music made by uninspired teenagers, Sing Street.
To be clear, I like the music in Sing Street, because I think it's appropriate to the character making it : decent and fun but uninspired and derivative. The love for Drive It Like You Stole It is truly a mystery to me, outside of the context of the film that is.