Matchmaking Ruining Game Experience

Someone please explain this "matchmaking" in normal PvP that riot uses. I'm a lvl 15, trying to learn the game, and I get matched vs a lvl 30, with over 1,100 wins, that someone tells me he's a Diamond 5, so I look later and sure enough he is.

http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1941733883/228305908

Someone please explain to me how this is a good experience for anyone? If you want to troll, sure, it is great for you. If you want to learn and get better at the game, it is better for no one, not even the higher ranked person in the game.

Riot is HUGE on "making the game experience fun for everyone." They say those kinds of things in the summoners code and advertisements and streams, etc... However, this is basically ruining the game for myself and many others that I speak with about this. We will simply keep playing the games we always have, which haven't been this one until we decided to try it. Other PvP games don't match a skilled player vs a non-skilled one for any reason.

Hopefully there is a rational explanation for this. Does it happen this way in ranked games too where they just throw a Diamond in with a Bronze? That would be stupid, but so far it seems like they would. Which is laughable that a company that makes hundreds of millions a year can't figure out a common sense matchmaking system.

If this is the way it is, there are way too many games out there that are more fun than a game with a fisher-price matchmaking system.

As I do on all forums, trolls will be ignored. I don't feed trolls, so if you are one and want to make a troll comment, please crawl back under the rock you came out of and continue to not exist. That is where you belong.

Thanks to the non-trolls that actually reply.