Migration assistant doesn't work for me even with root patches disabled

I am trying to go from Sonoma to Sequoia on my 2012 15" non-retina MBP. I screwed up once and reset my DIY fusion drive using the newer diskutil resetFusion command, so I'm trying to restore my data into a clean install.

I can successfully install and run Sequioa, but even when I follow Mr Macintosh's advice to run Migration Assistant without root patches, I end up in a loop of "Migration Complete" screen -> Restart -> back to "Migration Complete".

Quitting migration assistant works, but I think that resets the snapshot so my data is not there.

Any advice is appreciated!