I have been an Android user for 13 years now. After using almost every Google service possible I am going down the privacy rabbit hole lately. Gmail -> Proton Mail, Chrome -> Firefox, Keep -> Notesnook, Google Search -> Kagi, ...
I am currently using a Galaxy S23 with as few Google apps as possible (and focussing mainly on open-source apps). I am familiar with rooting (I was a CyanogenMod user back in the days), but today I want to use the phone without tinkering and problem solving. I also like to use a smartwatch and banking apps, so GrapheneOS is a no-go unfortunately.
So it is "Stock" Android (or Samsung's Android ) vs. iOS for me. Is it better (in terms of privacy) to use an iPhone or stick with an Android phone with an system wide ad-/tracking Blocker (I use Adguard)? It seems there are more privacy-friendly/open-source apps on Android.
All I know is LineageOS claims to support devices beyond the date manufacturers do. Graphene stops getting updates the same date the manufacturer sets.
LineageOS doesn't claim to be Degoogled, and it isn't so I think it would be an improvement, but a small one. It would remove the trackers your OEM has built into stock but that's about it. It's still phoning home to Google.