The stock files app is lacking to say the least. Try Material Files and optionally Round Sync which will allow you to access all rclone supported remotes in the material files app.
That was a long time ago (beginning of lockdown) but I don't remember having issues with skipping songs.
You can just download uBO and try, there's nothing to lose.
Hey, I like YAML config just as much as the next guy, but I understand the decision to go the GUI way.
With large Home Assistant installs YAML gets really messy, and most changes require a reboot to show up (well, both issues could be fixed by the devs, but they chose otherwise). I really thought that I'd miss YAML, but so far it's working just fine for me. Migration or restoring is a bit more tricky, as I prefer the start from scratch approach instead of the restore a 10 year old backup one.
Home Assistant's (docker install) backup is just a zip file of the config folder. This makes it easier to fix things if needed, but isn't as nice as editing YAML directly. I'd love to have option to use YAML if I want to and GUI otherwise.
As for developers being a bunch of assholes? Well, you're right. Luckily the community is much better and much more helpful.
For me it's restic with creatic wrapper, apprise for notifications and some bash / systemd scripts to make it all connected.
Everything is in a config file, just as god intended.