Ward sat out of the band's reunion after failing to agree with management over contract issues and Ozzy Osbourne, Geezer Butler and Tony Iommi went ahead and recorded a comeback album and toured without him.
He has since clashed with Ozzy over public comments the singer made about his former bandmate's health and abilities - and insists he'll only consider a return to the band if the frontman apologises, and a new contract is worked out.
And now he's going public with his thoughts about his former bandmates' latest album, 13, which hit the top of the charts globally and landed Black Sabbath their first number one in the U.S.
Unimpressed Ward tells the Eddie Trunk Podcast, "I didn't think it (album) was successful at all... I wasn't interested in the f**king album 13. I've heard 20 bars of it - that's all I've heard - and then I turned it off and said, 'That's a pile of s**t', and that's the truth. And I couldn't care less what they were doing on tour."
Still upset about remarks Ozzy made about his abilities as a drummer, Ward admits he no longer considers the singer a friend - and fears they may never be close again.
He adds, "It's broken up the friendship that we had; there's no doubt about it. I mean, it f**king killed the friendship. I detached from him. I think the day that he amends those statements, that will be one hell of a day. I think that'll probably happen in the next life or further down the road, but I don't think it's gonna happen in this life."