Need help and advice with Paphiopedilum

[Optimist]

Phaphs (ladyslippers) are terrestrial orchids, not epiphites. They grow in earth aka. Dirt. That would mean that your large chunk bark and fast flowing water and pot with holes may just kill it.

From what I know about the wild phaphs that grew around our house, they like more cool, shady areas.

---------- Post added at 04:59 AM ---------- Previous post was at 04:50 AM ----------

It is also fairly common for an orchid to bloom only once per year. Most of the year, an orchid is just leaves in a pot like any other houseplant. It is common that a basal leaf goes yellow and falls off. Orchids have regular leaf turn-over.

I think you are over-mothering. You most likely did not need to do anything other than continue to water the plant. You likely did not need to un-pot it and expose or soak its roots. Some orchids are really pouty and will refuse to bloom or do anything else if you man-handle it too much.