I wouldn't stress yourself out tbh. The fact that you can't de-rank is baby mode already. This is a good thing for "casual rank" play trust me. So I agree when Iyrnwaen here.

Just thank your lucky stars this isn't like League where you
actually do get kicked out of your tier. You only need 3 wins here to up a number but League can take dozens if not hundreds just to do that. It's hell on earth.