@badcustard Jordo could be trolling but it’s up there. The thing is there isn’t really a bad Nirvana track because Cobain was a fucking pop genius so it’s a bit of an easy win for that album.
However, in general you are right that the ‘song for the best of’ is a lame thing. I don’t know how many were specifically written for the best ofs, though. I think they often were just songs that had been recorded too late for the last album, or didn’t fit with the one they were making.