B5 REALLY?

To summarize I was dropped from S4 to B5, thats seven division. Firstly, I want to know why i never dropped below a b grade in my promos and that landed me in rock bottom of elo hell. To make it even worse I still have to play against other silvers and golds yet there are nothing but first year players and ACTUAL bronzes on my team. Idk wtf is wrong with you ranking system but fix it. I do not deserve to be bronze in most of my games weather it be a win or a loss I contribute heavily to my team and even then I wont receive an S ll set up several game winning plays but I dont expect you to give me an S for that but still it should be considered. All in All i dont think its fair you've placed me with actual bronze players and pin me up against gold and silvers and tell me to carry. Its not impossible but it just isn't right.