Arch is not stable but it's easy to fix issues arising from its rolling release nature. One of the ways being utilizing the AUR packagedowngradefor easy package version rollbacks. I should also note that the most common reason for Arch breaking is rarely ever because of the distro itself but because upstream has introduced breaking changes. You can see this when an upstream feature breaks in Arch, then Fedora picks up the same bug a few weeks/month later.

Arch is however the most solid distro I've ever used since I began using Linux many many moons ago.

One thing that is an Arch problem is that, if you do not update often enough, you can end-up with outdated keys that prevent you from installing before packages. The solution is just to update the keyring before updating everything else but this is confusing for a new user and kind of dumb in my opinion. I feel like the system should do this for me.

Arch already does this. Could be that your install has the keyring refresh service disabled but I've had it enabled for a good while now and I've never encountered that outdated pacman keyring issue.