If I recall correctly they had involvement with the harassment the drove byuu (another emulator dev) to suicide. There was also some supposed harassment of the Duckstation dev, and potentially some license violation when they forked Duckstation to make the “Swanstation” core. Ah, found the weird obsessed wordpress site, and it looks like most of the shit was around a decade ago, so I guess it’s not really even worth mentioning anymore.

I intentionally try to stay away from emulator dev drama. It takes a certain type of person to develop these things and they pretty frequently aren’t in a good headspace and aren’t particularly good at interacting with other people.