Beautyfull bananas you got there Amber,congratulations!
They seem to be grown to perfection!
I think your baby is unhappy because its kept too wet. Put it in a hot place receiving a couple hours of sun maybe too and let the the container lid open to dry up a bit. If the roots are not too much damaged,it will be fine and grow at a good pace then. I am germinating my banana seeds in my greenhouse/hothouse with half day sun and they germinate well and give robust seedlings. I only water when the top cm dries out a good bit.