Rossmann is a way bigger ranter than GrapheneOS people. Have you seen some of his videos lol.

Rossmann wanted to work with GOS and they didn't want him. So Rossmann made that video to make Daniel look bad for revenge probably. Saying he was leaving GOS was a lie, not that GOS can push malicious updates which was also a huge lie. Even after pointing that out that part wasn't corrected because Louis doesn't care about accuracy, he only cares about making Daniel/GOS look bad. He used his big following to punish Daniel. Now he works with Nick from Calyx after he got pushed out and are doing business together.

The more you learn about the story, the more you see the Copperhead stuff was just the beginning and those involved held grudges and pushed their grudges onto more people who bought their lies and it continued. Privacy-focused OSes that pretend to compete with GrapheneOS suck. GrapheneOS is led by someone with integrity, unlike some other projects.