What are your thoughts on GrapheneOS? It’s a custom version of Android that is far more secure and private than anything else out there. The only downside is that it only works on Google Pixel phones. For good reason though, as explained in their FAQ. TLDR, that comes down to hardware security features.
With many of us being activists and with state sponsored malware like Pegasus out there, we should probably step up our game to protect ourselves. Especially with Pegasus being Israeli malware, the current situation will probably incentivize even more attacks.
Other than iOS with lockdown mode enabled and perhaps DivestOS (which applies some of Graphene’s security features but not all of them), everything else is a complete security disaster according to the GrapheneOS devs. So are all desktop operating systems.
@starhonker is spot on, the best thing you can do is figure out your threat model and operate from there. I’ve watched a lot of people experience scope creep constantly wondering if its “enough” as they dive deeper and deeper. As far as anything state sponsored you are SOL imo not worth trying.