Help my Miltoniopsis seems to be dying

[Roberta]

Where there is green there is hope. You do have some good looking roots, and a new growth. If it had been my plant, I would have been quite so aggressive in the root-trimming... a less-than-perfect root can still help hydrate the plant, and with fresh medium it's not an environment conducive to rot. But I think that you so have enough to keep the plant going.