Worse than the 74-0 game in 2023 vs Cowgboys?
One of the most heartless ones I ever saw was 2008 vs Parramatta. It was "only" 44-6 but Parra didn't play finals footy that year. We had Danny Galea and Bronson Harrison starting props in an forwards injury crisis, classic Sheens.
I remember such half-hearted efforts esp. Ben Te'o, basically refusing to put his body on the line in any fashion. The team otherwise wasn't super lean that day, we weren't running on a bunch of teenagers.
Dawn Fraser sat in front of me, and my memory may deceive me here, but I recall she got up and walked out of the Member's section.