Arch is not an easy distro to use even if you know what you're doing. Every Arch user essentially creates their own distribution which can break at any point depending on their particular environment. You need to take care of all the little things yourself.

Personally I didn't experience all that much breakage, but eventually got frustrated by kernel updates breaking hotplug kernel module loading until reboot because Arch removes kernel modules for the running kernel. This breaks random things like plugging in a USB drive unless you happened to load the module previously, so you're essentially forced to reboot every time you upgrade the kernel or take care to manually exclude it.

I'm grateful for Arch because their wiki is beyond excellent, but I wouldn't recommend it to anyone unless they just want to tinker.