I think it depends on maintainer of the device. For me personally, LineageOS has broken a basic workflow like having Signal voice/video call. None of the IM apps are able to pick audio from microphone on my device (and various other models as well) due to a bug in LineageOS for almost 6 months. I regret installing it.
Signal. Though SimpleX is growing as a superior private messenger.
Desktop = Fedora
Home server = AlmaLinux
Mobile = GrapheneOS
Router = OpenWrt
Your English is perfect. There is no indication of low intelligence from the way you described your issues. B and C grade are pretty average and indicates you can learn with hard work. I think what you might be experiencing is anxiety and that is causing you to think you don’t have skills or intelligence. I am not from US so I don’t know what kind of help might be available for you there, but I would suggest you to look for a job with something you like to do even though the pay might not be great and then eventually your interest will take you further in your career.
Yep. It was developed to improve parallelization and security of Firefox. Many core parts of Firefox have been replaced with Rust implementations.
Don’t bother videos against GrapheneOS. The lead of GrapheneOS has autism and he lacks social skills. This creates endless loop of hate talk between some YouTubers and GrapheneOS.
As a technical project, GOS is far superior and it is the most secure OS on the planet right now. The lead of the GOS has developed hardened malloc and various other security solutions that is now baked into GrapheneOS. So I would ask people to enjoy the project rather than stimulating more fuss against the project.