Rotting dendrobium -is it too late?

[Tortoise]

everyone, I have been trying to grow many orchids for years but ultimately I[IMG][/IMG] end up with root root and lose them. I used to try bark mixes but have since been using some leca as 2 of my dendrobiums were sold to me using this method. One dendrobium Frosty Dawn is looking almost dead and I wonder if there is any glimmer of hope and what I should do to give it the best chance if its even possible to restore it to good health.
Ill attempt to add photos here and thank you

https://scontent-sea1-1.xx.fbcdn.net...rw&oe=63F4406D

https://scontent-sea1-1.xx.fbcdn.net...8A&oe=63F3B127