To be fair i've not tried fucking up with this too much
We could tell.
Sorry, but what you are dismissing as "They only... You still... You lose..." is very ignorant.
What the GrapheneOS team has achieved is technically impressive, sandboxing Google Play is something no other project has done yet, and now with Private Spaces you can essentially split your profile in two and decide which apps you want Google Play to run through, and which you don't.
I put all the privacy intrusive apps in the private Space and installed Google services there, and I only open that space about once a week to keep in touch with some friends. The rest of the week I'm enjoying a fully degoogled phone using only FOSS apps and a bank that doesn't require Google services to be installed.
The team deserves all the praise they get for building the most secure (and ironically, private) OS in the market right now, even with Google being so antagonistic to them. The phone is fully functional and we're definitely not living 10 years in the past.
You should give it a proper try and form a facts-based opinion, or stop talking about it altogether.