Could be related to your cache, because on our Web clients we cache a lot of data from the relays which could eventually lead to poor performance. Try clearing your cache or using Primal on a different browser entirely.

Using a VPN could block certain permissions that Primal needs in order to perform at it's highest, so we recommend against using one. However performance should still be usable. If this is not the case feel free to reach out to me directly via DMs and we can go through further debugging steps.