Why am I fighting Ex-Diamonds and Ex Plats?

So I've never even seen Gold (got to Gold promos ONCE last season), otherwise I just jump around from S2 to S4 and back up.

I started a new account and got to 30 blasting away in Normals. However, about maybe 30 games into that account, I've noticed that EVERY SINGLE god damn game has 2 Plats on average on both teams, 2 Golds, and sometimes 1 Diamond border.

Like WHAT THE HELL??????

Now OBVIOUSLY since its a new account and I am in fact a high Silver, I get that I can have some high KDAs and many consecutive wins, thus jacking up the MMR a bit. However... how is it possible that its been jacked so high up that I'm playing against Golds and Plats every game?????

I don't even see Golds and Plats on this account ranked (my main).

There's something seriously wrong with the match-making. I think I've somehow tricked the game into thinking I'm a low Plat/mid Plat smurf while in actuality I've never seen Gold in my life.

Hey its not hard to play your mains on a new account and then kick some SERIOUS Bronze around. But really? PLATINUM?????

HOW??????

And what can I do about it because as a result, I have NO AGENCY in those games any more. I don't even have to be around; I play Mid and I can't even keep up with how fast these Plats group up and attack. You always have some ridiculous Plat on one team or the other doing these 1 vs 3 plays and by the time I get there its decided.

I don't think the MMRs going to drop either because I can win at least 50% of the time (even though I'm doing nothing, just good enough not to feed and knowledgeable enough to know where to be).