I’m an avid Phalaenopsis orchid owner and have recently branched out to other types. As such I have a fairly good idea what living orchid roots look like, but I want to be sure before I essentially remove all the roots of my miltoniopsis morris chestnut. I knew going in this was gonna be a tricky plant to keep but I underestimated the challenge. Any advice would be appreciated.
I do see some new green roots and a new little bud coming through so I have something to compare with but I’m seriously hoping somewhat brown roots are normal for this little guy or I think most of it gonna be a goner

Current care:
Kept in a humid, warm sun room (73+ F and at least 47% humidity, typically higher). Kept next to a small humidifier in front of a screened eastern window. Watered every other day (too frequent?). Potted in bark and moss mix with some perlite. I live in Chicagoland for reference.