Riot does not pair "new players with new players" and "smurfs with smurfs," despite popular belief.
Anyone with RTS/moba experience gets put with the smurfs. You need to basically be new to video games (miss every single cs, etc) to not get put with the smurfs.
Way back when I started playing League, I got put with smurfs. I had moba experience (Dota allstars, Warcraft 3 map). My mercurial scimitar full AD Nunu somehow got detected as a "smurf" despite me being awful at the game (and placing bronze 5 when I finally got to ranked). Just because I somewhat knew how to play this style of game.
So yes, the new player experience is horrible. Unless you're literally new to playing PC games. Then your new player experience might be okay.