Having trouble running battle.net in Linux using Steam/Proton? Try setting Steam to run the battle.net installer from say ~/Documents every time with the bnet install location as the working dir. This is basically using the installer as the launcher. It finds a local copy of bnet already installed so it runs that. Quick, easy, keeps it updated too. I use this on both Arch, Fedora, and my Steam Deck.
The old saying about a station wagon full of tape remains true!
tl;dr They block UDP if it uses more than a little bit of bandwidth.
The USB based updates for my Blackmagic Videohub 40x40 12G were hanging at 0%. Turns out the fix is easy: Don't use USB, use IP for the update. While I had to use the setup menu on the front panel to do a rather painful IP change, once done it's done.
