hypothetically, if someone had a bad transplant like that and the leaves were falling like that, its likely the root trauma. Using root grow stimulator would have helped during the transfer, but would it look like that before getting better?

If ever confronted with this type of problem, I would be interested to know the best way to help the plant recover? Cut worst leaves hoping for few better ones to recover? What if everything is bad except the stem, still a chance for regrowth and recovery? If anyone knows more about this please share the knowledge