Smurfing is a very common thing in any competitive game with the matchmaker. Instead of complaining about it, you'd rather think how to improve to not play in smurfing elo. Because it is simple as that, you can not smurf in high ranks. If you want to have more even matches - force yourself to improve as fast as you can. Competitive game requires dedication, playing it casually (in low ranks) is punishable (smurfs). As soon as you rank up high enough you will understand why ppl do this, you can call it "to stomp kids" but many of them just getting rid of high elo stress that way. This is not to excuse or advocate for smurfs, but to show you the other side to set your mental in the right direction.
Want to play casually - then you smurf. Ranks are the pathway from point A to point B.
If you don't go to radiant/immortal, then they will come for you. Don't look for anyone to fix your "issue", play competitive as you should and everything will get fixed by itself eventually.
Yesterday I had an interesting game in diamond 2. Well, I am diamond-2 (washed up immortal-1 peak), but the rest of the lobby were immortal-1/ ascendant -2/3 for some reason. On top of that, one guy in the enemy team was doing 45 frags in 25 rounds, while I was at 15-18 something and our top fragger was at 31. So that was a booster or hard smurf from imm3/radiant basically. We end up drawing after 2 overtimes, btw. Did I enjoy that game? Probably not. But I've learned a lot how an actual player can punish all of my mistakes and show it to me the best way possible - by beating me and my teammates, because I play worse. And what I also learned, is that how overheating with 45 frags still allows you to lose the game even vs easy opponents.
The rank you play is not your personal sandbox, it doesn't protect you, it just shows you the way, so you either go up or go down, and get punished for not learning the game and get rewarded for improving. Accept this rule of thumb, and you will get clear mental and easier time in this game as a result.
