Couple things….
You've been asked for a photo several times with no response. In this situation, a photo is truly worth a thousand words and will go a long way in helping us determine the condition of your Spider. I recall the photos you posted when you got this BP, and he looked to be in fairly good shape then. Hard to believe he's gone that far down hill in such a short time.
Also, quit trying to feed this snake in a seperate tub. I know you have to do that for your females, because you house them in the same tank, but they are a seperate issue.
Then everyone you've talked to is tremendously uninformed. Cage aggression is a myth and has been debated on this forum multiple times, including in two current threads that are active right now. Makes me wonder if you did any research on feeding outside the enclosure, or if you just listened to everyone?
If your Spider is not taking F/T, try feeding him the correct sized live prey. It's doesn't mean you can't go back to F/T later, but you may need to use live to get him jump started.