But if you need to use apps which you trust but it depends upon proprietary Google bits then microG is the best alternative now.
microG > Open Gapps > Gapps
e.g. Signal needs GCM to send notifications, If it doesn't find one it will revert to pull notifications. Pull notifications are unreliable and are subject to being killed by battery management due to power consumption. Not to mention missing notifications during emergencies could be dangerous.
microG is totally configurable, You don't need a Google account to use it. So even if Google knows about your device, It would require parallel construction to identify you personally. I think that's even better than using any Google app on iOS.
It's still running tons of spyware yes but it's an alternative on phones where MicroG is not an option. Eg Samsung phones with Knox enabled.
However it feels like the time of social media is already coming to an end. With the companies filling our timelines with ever more crap in a futile attempt to 'engage' us, they are only driving us ever more away.