Oh, my apologies. I remembered wrong based on this thread:
You never said straight up that you were smurfing, but since you were so pro-smurfing, so did I remember it as if you said you were also a smurfer.
My bad.
I can only comment that your region must suck if it’s such a common thing to have super low levels in your matches so often. Assuming your main isn’t relatively low either.
When I get super lows in my games, it’s either because it’s ARAM or because the super lows are queued with somebody high level. Or rarely they’re just super lows, but I was queueing at 4 AM on a normal workday.
And well, who knows, maybe your region is also way more smurfeous than other regions. I wouldn’t know, just throwing that possibility out there. 
Well you got one right here. And I know my irl friends and some other friends wouldn’t either.
Although not like this matter. Doesn’t prove anything that I say this, likewise for you.
I also got a friend who only plays a few matches of this game every 2-3 months or so. Yet despite how he seldomly plays and should obviously be rusty/unfamiliar with changes or the meta or whatever, he exclusively plays nothing but SL.
(Despite how seldomly he plays, he still manages to stick around Platinum)