Gargari

Nost as a protocol is way bettter. Nostr is BTC fanboyz place, unfortunately there is no content

Adguard is good, very good. Their rules are default included on uBO, they know their jobs well so getting very good product. As an alternative you can consider NextDNS

Cash is bad, but better than CBDC

There is sponsorBlock version as well

Obtanium

Just get OrganicMaps

Yes, check SSU transport

I'm running them on a VPS

Same here, I do run a i2p nodes though. Would be great that if privacy focused companies would offer alternative i2p entry sites

Nope, use i2p and never go to clearnet

Mullvad, iVPN

Nope. And you shouldn't as well