"I shouldn't have to EARN gold/plat/diamond again if I already did it once!"
Except you do, because earning it in S5 is not the same as earning it in S6 because the game has changed. Your hyper entitlement only shows your fear that you are not as good as you claim to be. Insecurity, weakness, that is what you are showing when you want to retain a title rather than having to earn it through skill, effort and merit.
I welcome the challenge of working my way through the ladder... as I always have, I will rise back to Diamond no matter where the system places me because I am a Diamond level player. It's that simple.
Water finds its own level, if you are afraid you'll "get stuck in bronze", maybe that's where you truly belong.... The system is working, the system is not wrong, the system is fine.
Now, let's see if you can walk the walk. Ranked season has begun, let's rise and take our throne above.