Yes, windscribe vpn sends your DNS traffic to its own servers to prevent your ISP from spying on your traffic. They claim to be able to block ads so why are you also trying to run a pi-hole box?

I ran into basically this with home assistant. Commented on an issue about an integration to point out that it didn’t work at all, and to support another user that had rewritten it in a way that fixed it. The approval dev jumped in to say that they only permit single changes to be approved. That’s fine, I guess, but to fix the issue multiple changes were necessary. The user that had rewritten it then tried to limit the change to a single fix, but because that didn’t resolve the issue they blocked the change. The integration still doesn’t work and the user stopped trying to fix it.

Ooma seems to have a reasonable product. Better than GV, at least.