[Catcym]

I bought this plant bare root a year ago and planted in Schultz orchid mix. I have the Cym indoor and I saw a few new growth. It has not bloomed. The old leaf is darker and new leaf is lighter and smaller overall.
Today I examined the plant and found a new growth base turned black. It might have water rot. Then I immediately remove top layer moss.
I also uncovered some of its roots flying out. Should I repot to a large pot ? please help.

Attached is pictures taken today.
pict1- The Cym
pict2- different angle
pict3- root coming out to surface( flying root)
pict4- flying root 2
pict5- close up of bulbs
pict6- flying root