Look at this. You matchmake me, A LEVEL 16 against a J4 Plat 2 top laner that has full Tier 3 runes, and Full masteries. Not only that, their whole team is above Level 30, 3 of them being in plat. You really think new players are going to want to play against this? Losing every game because theyre at a disadvantage.
Not only that, it take roughly 5-15 minutes to even find a normal game at this level, just for the game to be completly biased on whos the higher level.