Hi enter, thanks for sharing your thoughts and feelings with us, I appreciate it!
As mentioned in similar threads, the dev team has begun investigating smurf accounts. I don't have much else to share aside from that, unfortunately. I know it can be very upsetting to play against someone or a group of enemies pretending to be low-level players when in reality, they're high Plats.
I like the idea of increasing the clearance level needed to play Ranked. That change would singlehandedly bring down the number of smurfs. How often do you encounter smurf accounts when you play? What's the experience like?