Earlier quoted context omitted.
Are most VPN provides unreliable? I don’t know - never researched this. I use Proton VPN because it is bundled with ProtonMail. I very much like preventing my national Internet service provider from selling my browsing history.
Mulvad seems to be very reliable. https://mullvad.net/en/
I frequently have DNS issues with Mullvad, and also speeds are lower. Proton is also more expensive though...
Also, there's a long outstanding issue (on their Github [1] ) which they have confirmed) that the Mullvad app causes iCloud services to stop syncing (bookmarks, Files, etc.). That's a showstopper if you use Apple devices...