Can someone explain to me low elo matchmaking?

Im gold 5, I climbed up to G5 earlier this season, then lost a bunch of games, dropped back down to silver 1. Climbed my way back up to Gold 5 again. However, this time at Gold 5, its been... different.... So basically my teams have been consisting of brand new recent level 30 players, and a duo. The enemy team? Golds, no duos, no recently leveled 30 players and no bronzies. I get that riot tries to "make up for the communication gap" when a duo is on your team so they give the other team higher mmr players, but why now have the past 5-6 games that Ive been in have had this? I even dodged 2/3 last games because I saw they were duo. No Im not any good at this game, and I enjoy trying to carry, thats all fine and dandy. But when every single game your in has newish players in it because you keep getting paired with a duo, its kind of annoying and has really sucked the fun out of the game.
Plus, no offense Riot, but duo communication in low gold/high silver really isnt going to make or break a game.

So, why does this keep happening to me? It didnt happen last time I was gold, even when I lost a ton of games in a row to drop back to silver.