I've degoogled my life as much as I can, but it's almost impossible to completely ditch Google Maps, YouTube, and Android. So I'm not even sure I've done anything significant, because I assume they get pretty much everything from my phone.

Not much honestly. Still use Gmail and Drive

Tried DDG a few times over the years. Sorry, but it just doesn't do it for me. Results were terrible. Google had lots of results and it was just too much effort to keep switching from DDG if it doesn't provide an answer. Because I know Google will.

The biggest thing I de-Googled was gmail. I had my own domain already so it wasn't tough to move (to my web hosting provider's included email service).

I switched to Firefox+uBO from Chrome.

They de-Googled RSS for me (now on Newsblur).

Things I still use:

• Drive for backups (but have a local backup in case their AI bans me)
• YouTube Premium (I hate ads)
• Contacts (Cardbook addon for Thunderbird works well with this)
• Calendar (Thunderbird supports natively)
• Keep (Shared shopping list)
• Pixel phone (I don't really care for Apple, either)

Basically outside of Youtube I don’t use any Google service. Started by migrating to Kagi search, and while it requires a subscription, its a price I am willing to pay for a search engine that actually work good.

Everything else I use a mix of FOSS and subscription services.

The only thing I still hold onto my account for is YouTube. I pay for mailbox.org which covers email, calendar and cloud stuff. Their website could be better but the service is quality and their privacy policy is tight. When I was on android I used a bunch of custom roms with microg. My favourite ended up being calyxos but they all had a little jank here or there. I dearly miss NewPipe for android as a replacement for the official youtube app.

Edit: I also pay for Kagi for search. The price is a bit steep but I have found it justifiable in terms of the value I get from it. Whoogle and Searx are good options too

I was degoogled until late last year. Then 2 things happened. 1, I got a Fitbit watch, and 2, I started a delivery gig job where I needed play store and google services. Fortunately I might be getting another job soon (got a conditional job offer yesterday) and quitting the delivery since I'm making less money now. Also, looking at getting a different watch. When these things happen, I'll probably reinstall LineageOS without play services and delete the fitbit account (which is soon going to require switching to a google account.)

I have hosted email and nextcloud that I use for storage, calendar, etc. I've lived without google before with no inconvenience and I can do it again.