Help! These days Winning =lowered rank % in ranked

Whats up everybody!
This situasion better be a error,in ranked. . Just hear me out here.
I was silver 3, at 89%.
But the last 10
matches i have won, only took precentages down 86%.too 76 % too 73%,too 70%,too 68 %and Soo on and soo on!
Every match,i have won has decreased my pro
Why in the heck does it go backwards???
Im frustrated at ranked as it is,dont make stuff harder 2 enjoy Coalition.
Its like climbing a tree full of grease,thats ranked for my since the update👎.
What is going on?:confused: