MMR is a total garbage for new players like me.
Most of us soon realize it's just a Random Walk.
You have learned macro playings; lane control, tower trading,
how to switch the lane, invading enemy jungle for snowballing, Barron bait, etc...
Now that you can carry some games, 75 - 90% winrate with certain champs can be reachable.
Even so, all of a sudden, you get lose streaks, followed by its positive feedback,
the more you lose in streak the more you encounter afks and trolls on either side of the teams.
Your weeks of efforts are ruined just because of afk players,
not because of the change of meta, nor because of you.
I know many bronze players who, including me, is no good especially in mechanics
but surely deserve to be Silver at very least. (Our CS is rather still low compared to Gold/Plat players).
But I think this is designed to be so.
Your 1st season shall be placed at Bronze, which must be what Riot thinks.
So I don't care about shit matchmaking anymore.
If you want to be Gold, just buy a fresh new account with better MMR.
This is the best and rational way of getting out of Bronze.
I've already played much games with a lot of fun, losing the interest to the game.
It's just intended to be so. See you in Dota2!