I was not implying that Muffet is a bad coach for the collapse. I was generally curious how it occurred. How did all that talent end up in one class, were their injuries, redshirts, just seems weird, Muffet had a well oiled machine them boom.
@DefenseBB covered a lot of it. But I'll jump in, too.
Ogunbowale, Mabrey, and Shepard played four years and graduated like normal (the first 2 years at Nebraska for Shepard, of course). Turner was a 5th year senior, having missed the 17-18 season with an ACL tear. Young chose to go pro as a junior (and was validated by being the #1 draft pick).
So that's how the entire starting 5 ended up in the same draft despite Turner and Young being two recruiting classes apart.
They were, of course, ND's top 5 players in minutes played in 2018-2019. 6th was Abby Prohaska. She missed the entire season with blood clots in both lungs. She has since recovered.
7th was Jordan Nixon. She chose to transfer.
8th was Mikayla Vaughn. She missed the entire non-conference season after suffering a knee injury in the season opener.
9th was Danielle Patterson. She chose to transfer.
So ND lost 8 of their top 9 players from the 2018-2019 season and the ninth was limited to half a season.
Marta Sniezek and Destinee Walker coming in as transfers wasn't nearly enough to make up for it.
ND lacked size (especially when Vaughn was out) and shooting ability. They couldn't score inside and they couldn't spread teams out and score outside. They also had no depth with only 8 scholarship players on the roster, a number that included former walk-on Katie Cole. And very little experience besides Sniezek.
Everything came together for the perfect storm of bad-ness.
Next year should be better if only because everyone will be older and more experienced and there will be 6 more scholarship players to work with (5 incoming recruits + Prohaska).