You can remove 3rd party spyware/bloat in 15 minutes with Shizuka/canto and a usb cable and you won't notice anything changed in the phone. Unfortunately the Google spyware is so deeply integrated that you can't really do that unless you accept a ton of things not working - not just Google apps but also lots of third party apps that require Play services.
> You can remove 3rd party spyware/bloat in 15 minutes with Shizuka/canto
These techniques seem not to be widely known. A kagi search turned up only information about some singer.
Yes, if you want full degoogling you need a custom ROM like Graphene on Pixels or Lineage. The main issue these days is that bootloaders are locked. Phone manufacturers mostly refuse to give you control over your own hardware.