a better example from that album is the title track which sounds about as dreadful as you'd imagine. But the live version of it on their most recent big box set is genuinely pretty decent.
Smart Girls is bad in far more interesting ways than Summer Of Love. You could potentially sneak SOL in onto a Beach Boys playlist without someone who hadn't heard it before raising an eyebrow. Smart Girls on the other hand will drive nails into people's ears. It sounds like the audio file is broken. The chorus could probably be repurposed into something good, it's a pretty Wilson-y melody.