It's probably a fluke on your setup. What package manager did you use that didn't work? Are you a Unix/Linux type of guy? Most people that aren't have hard time installing any *nix based development environment. I mean, you got an error telling you there was not sqlite3 and you tried the gem and no dice, it's pretty obvious what to do if you're familiar with any Linux. To be fair though, I believe there's no mention of you needing sqlite3 on the download instructions on the main download site, which ultimately leads to confusion.

I'm not trying to sound aggressive or anything, but I think that this type of issue is more related to to using some outdated or excessively complicated guides on the internet that always leave something out, in comparison being hard to get ror up and running.

I've been working with Linux for many years (Ubuntu is my main desktop right now). Ubuntu's gem package simply isn't compatible with the latest version of Rails which means you have to install rvm and figure out lots of stuff.