Tried several & they all give me higher ping on UK servers than Mullvad.
Nord / Proton / TorGuard / Surfshark etc
Now & then i do add a month of Mullvad just to see how’s it’s doing on the ping side but the same issue always arises for me.
I also wish they’d increase the 5 device limit a bit, not by a stupidly high amount, but it’s been 5 for several years now & the world today is a far more tech reliant world. (8 devices or so)