The out of date package problem you're running into is because Mint is based on the LTS version of Ubuntu. This means that it's set up for long term service and stability. All well and good if that's what you're after.

As to your problem, I'm not big on Endeavor - or any Arch based distro - for folks who are new to Linux. Unless you're willing to take the time to use Arch itself and set up your system, and learn how it all comes together, you're better off not using Arch. I know I'll get shouted down for this, but IMHO, all of the easy install Arch based distros are terrible for people new to linux.

If your biggest issue is that the software versions aren't as up to date as you'd like, then all you really need to do is switch to a non-LTS. I'd recommend Fedora. I use it myself, and it's easy to set up, works great out of the box, and is up to date. They come out with a new version twice a year, and upgrades run smoothly.

If you're really focused on a rolling release, though, I'd suggest looking at OpenSuse Tumbleweed. It's rolling, super stable, and has a fantastic community. Their Yast tools are famous and really impressive.

Alternately, take the time to install a proper Arch setup. You'll learn a ton, and find out that all that maintenance stuff you feel like you don't have time to do isn't that big a deal, really.