Low level matchmaking

As a low level player once you reach level 18 you can expect to be playing against level 30 plat/diamond people while your whole team consists of pre-30 noobs. Almost every game I play there is someone on the other team level 30 and ranked while my whole team is level 8-20's and naturally, they go godlike legendary and 1 shot everyone in a 20 minute stomp. They're always playing their mains and tryharding too. So fun! And dont you dare get frustrated or upset by this bullshit or you'll get banned by their awesome behavioral system! I got pissed at a level 30 diamond Talon and Level 30 Plat Udyr who was on the other team, raping my entire team of pre-30's, BM'ing, dancing and calling us noobs in chat. I told them off basically after causing our Poppy to quit and got reported by him and his duo buddy. LOL

Here is the game in question

Go ahead and check the profiles yourself.

Blue Team: Me, the vayne level 19 Singed level 24 Udyr level 23 Orianna level 21 Poppy level 17

Red Team: Talon Level 30, 1558 wins, season 5 Diamond Lucian level 21 Udyr level 30, Season 6 Plat V Graves level 8 Xerath level 11

This is a common occurrence.

How the fuck is this okay? Someone please explain to me.