It sounds like you don't like the people performing the music. I don't really care about that. The music sounds good.
Dennis wasn't the best person in the world at all times, but many put that past because of the songs.
Well, of course not even implicit but very explicit in what I wrote is that I think the two people behind the album are moderately to severely gross.
But aside from their personal lives, I also find Depp to be a more expensive version of John Stamos. Depp clearly bought his way (with fame if not actual money) into being a rock star. As I mentioned, he's Stamos but with much more money and bigger name rock star friends.
Not that there can't be non-professional musicians/singers that have true talent. But just as with Depp's non-singing voice/persona, I find his singing to be far too grumbly/mumbly/incoherent.
I think both Depp and Beck have a checkered work history that makes their collaboration make total sense. Beck has alienated a lot of people in the music/rock world and is known to be cantankerous and difficult to work with, and Depp has a history of showing up late, being too f-ed up to work, etc., and obviously has what is at the very least a *mixed bag* PR situation currently brewing. In short, Beck has probably run out of any great options for people to sing on his albums, and Depp has run out of high-paying movie gigs and is doing the self-indulgent rock star thing instead.
The Dennis Wilson comparison doesn't really do Depp a lot of favors, as Depp is clearly in some level of denial about his work drug/alcohol abuse. I think far more self-delusion and denial than Dennis ever seemed to have. And even with a pretty decent level of self-awareness concerning his problems, Dennis unfortunately wasn't able to survive.
But again, purely from a PR standpoint as it pertains to the Beach Boys, this isn't exactly like an A-list, homerun project to have any even tangential association with. To be clear, I don't think this project hurts the BBs or Dennis; they can't control who covers their songs.