Your analogy of MMR was really bad and left me wondering what your point was so ill have to skip responding to it, sorry 
Just explain what you think without an analogy.
From where? Official data shows so far that Gokd is actually one of the largest in population.
Nobody would get quickly to their respective tiers, it would take hundreds of games of fiesta worse than now.
Gold 1 actually puts you in the top 32%~
They actually dont do any kind of resets, soft or hard between seasons.
If youre not talking about resetting your rank to your MMR which may deviate from eachother between seasons.
And you were proba ly talking in your analogy about the MMR of the general population getting higher and your rank getting lower because of that as its tied to the MMR, when others go up next to you, yours is perceived to drop.
But the MMR as far as we know is relative to the skill of the playerbase.
Also there is no MMR decay below Diamond rank.