Lyric discussion by dri-ft 

at the start, I think you'll find it is "People just ain't no good/A THING that's well understood".

or at least, it's fairly clearly that in the version that I've been listening to.

I think this is quite touching. I guess it's more about not being able to connect with people than people being bad as such.

"It ain't that in their hearts they're bad..."

An error occured.