I don't agree that he's a "poor" musician, that's your opinion. Van Halen has some great songs, they are a fun "party rock" band, does music have to be "significant" in some way to get approval? It shouldn't, it's supposed to be about entertainment.
I listen to lots of serious music, but once in awhile it's nice to put on some straight ahead party rock and cut loose.
At least Van Halen actually PLAYS instruments, how many million selling pop stars of today could even tune a guitar let alone play it?