The main TLDW: Yuzu was reaping huge income and bragged about delivering at-launch support for major Nintendo Switch games, thus directly diverting paying customers from Nintendo. The other major aspect was Yuzu was facilitating encryption key distribution which is how Nintendo was able to bring forth a legal attack.
https://youtu.be/7rzWR9JP1WE?si=wbsDoWLD7DatWlS3
The main TLDW: Yuzu was reaping huge income and bragged about delivering at-launch support for major Nintendo Switch games, thus directly diverting paying customers from Nintendo. The other major aspect was Yuzu was facilitating encryption key distribution which is how Nintendo was able to bring forth a legal attack.