However, I do believe he is very devoted to improving the privacy and security for all users, despite his communication issue. So I personally still uses grapheneos.
Similar alternatives are divest and calyx, but it seems like graphene is still the best for me and probably for most beginners and experts alike.
If you need Android Auto, the closest thing you'll get is LineageOS with some sort of GApps, but those are far from the "privacy and security first" goals of GrapheneOS.
If you are looking for something private/"FOSS-focused" and don't need Android Auto, I like CalyxOS a lot, and have heard good things about DivestOS.
I generally like Louis Rossmann, but his arguments in the GrapheneOS video were beyond stupid. He says that he can't trust GrapheneOS because it's developed by Daniel Micay. I guess he doesn't understand that GrapheneOS is open source and anyone can see the code. Then he switched back to the proprietary Google ROM. So he's trusting proprietary software that's filled with spyware over privacy-respecting open source software that can be audited by anyone.
You don't seem to understand the situation either and you blindly follow some YouTuber. I'd advise you to overthink your opinion on this topic.