Mullvad does vpn stuff while also being privacy focused right?
Dunno about Vandanium, but the rest regularly have their own unique issues that Mullvad doesn't have.
Safari is... well Safari. Firefox is insane as of late so... yea. Many things are broken when tor is involved and mullvad is the only reasonably normal browser of the bunch. (RIP Firefox)
To be fair, I actually kinda like Safari, but sometimes it just doesn't work. At least that's how it was when I had a Mac.