Fairphones have awful updates, privacy and security. They don't provide crucial hardware-based security features needed to have working encryption for the vast majority of users not using a strong passphrase. They don't provide what's required to have decent protection from remote attacks either. Their devices don't provide important driver and firmware updates we need to have for each supported device. Fairphones end up with an end-of-life Linux kernel branch after a couple years and have never migrated to a new one.
Fairphone has a very close partnership with Murena and replaced their own open source OS with /e/. /e/ and Murena have repeatedly falsely claimed GrapheneOS is mainly used by criminals and isn't useful to regular people. They've heavily propagated false claims about the usability, compatibility, privacy and security provided by GrapheneOS. These years of inaccurate claims have resulted in many people being misled about GrapheneOS and have done immense harm to it.
/e/ and Murena have even repeatedly claimed private and secure devices in general primarily benefit criminals and pedophiles:
https://www.clubic.com/actualite-604786-murena-e-os-intervie...
https://nitter.net/GrapheneOS/status/2040887784253141142
Murena is explicitly not on the side of people wanting protection from authoritarian surveillance by governments. Fairphone supported Murena's inaccurate claims when contacted by the media and their employees regularly participate in it. This is what they choose to market as private and secure: