I'd say Arch is pretty simple, just not easy [0]. Easy would be inserting the install cd, walking away, coming back and being able to hit the internet. Which is fine, if that's all you want to do. Arch installation isn't easy, it's simple, and more importantly it works. When I install windows from scratch you know what it comes with? Nothing. No drivers, no programs, nothing. Not even an ethernet driver for me to get the other drivers. Arch comes with all of it out of the box, you just need to go through the tutorial so you can choose which things in the box you actually want.
Arch is simple in that if I go to any scary looking file in /etc and open it up I won't be completely baffled by what's in it. I can randomly shut down any service running on my machine and I know my box will keep chugging and I can recover from it. There's no weird services that I don't know what they do, no scripts that run on startup that I can't understand let alone find. There aren't inter-dependencies that I don't know about. When I run ps aux I can account for every single thing running.
And even then, the package management is simple AND easy. I have never had a problem installing something with pacman, not once. There's this oft-repeated line about upgrades breaking systems, but I've never seen it. If an upgrade fails I look at the front page of archlinux.org and see that some manual commands are needed, copy-paste them and voila things work. I've used arch on three computers now, two laptops and a very old desktop, and have never had any problems. I know there's going to be some horror stories, but I can counter any of them with a quick search for the same in windows. Problems upgrading happen, but they're not common, and not something that's inherent to Arch like I've seen people suggest.