hi Marko,
Trying to optimise my business fiber optic with HT in Croatia, we're based in Rovinj.
I also tested dns0.eu which has excellent privacy features and collects no data.
They claim having a server in Zagreb but when i ping/trace 193.110.81.0 or 185.253.5.0 i am routed via Vienna, not optimal. Do you know the exact address of their Zagreb endpoint by chance? They seem to use EdisGlobal and Cro Web Host as partners, which i just emailed to see if they can share info with me.
Otherwise, yes Cloudflare is faster and POP in Zagreb but isn't as private. Is better than Google but they have a "Limited data sharing with APNIC".
1.1.1.1 Public DNS Resolver · Cloudflare 1.1.1.1 docs
Regards,
Gabrio