Stay away from both Fairphone and /e/OS/Murena. Fairphone fails hardware security in the most miserable way, and fundamentally breaks Android Verified Boot, while /e/OS is based on the highly insecure LineageOS, and it further rolls back security, while also repeatedly missing important security patches.
Also, 600 dollars is absolutely not cheap for a smartphone, and it's especially not with it considering that both the hardware and software are highly insecure.
A Pixel can be purchased for much less, while being superior in every way.
Yes, it is much worse than stock Android
https://madaidans-insecurities.github.io/android.html#lineageos
https://eylenburg.github.io/android_comparison.htm