Jesys vocals always reminded me of a girl who used to sing at a pub her parents owned- they were really trying to push her as a singer but that confidence in her made quite arrogant with it. So every song she sang it had a “trying too hard” vibe and you could never work out what her actual singing voice would be if she was just herself. Jesy is the same- try hard vocals that are just a bit abrasive to listen to and don’t always fit the song.