I use Mumble + XMPP with an IRC gateway to cover everything voice & chat related …but there are plenty of options to replace Discord, you just need to let folks know you don’t want an ad-filled proprietary experience & that you wish to be contacted in a manner where your privacy is a priority.

Google’s reviews have a lot of junk in them except the ones stating business closed/moved (OSM you can literally delete or move the POI, but less users). The integrated crowd-sourced images of establishments however is missing which makes it hard to understand POI in comparison—a picture is worth a thousand words.