Arch is still a better choice because gaming is generally using cutting edge software.
It works great if you mostly stick to official Debian packages through and through.
I need external repositories (albeit rarely) with Arch too though and that has never caused a problem.
If you want iPhone ease Linux use Ubuntu based distros. But traditionally Linux hadn’t been single click easy. Much like smartphones weren’t originally iPhone level easy.
Polite edit: if you’re a Linux noob start with a vm or live disk Ubuntu image and play around. If you like computers and understanding them, you’ll find the lessons you need as you need them by searching the web. Then you’ll install a bunch of distros and understand what I mean.