How can I cure my dwarf gourami from pain and stress from being stuck in a castle ornament for 3 days?

He’s about 2 inches in height and my castle ornament is about an inch and a half wide. I’m not sure how he got there but all you could see was his head inside the castle breathing (stuck ofcorse). I finally was able to get him out by flipping the castle many different ways hoping water would force it out! Thank God! He finally got out but now his body looks like it has purplish spots and seems to have dent marks from him trying to sqeeze outta the lil hole. Once he released himself the other tank mates tried to pick at him. He swimming sideways and seems to be very weak. I temorarily removed him and put him in a lil ice cream bucket ive been usin forever for water changes and things like that. I also put an airfilter in it just so itll have oxygen and i noticed a lil white spot on him so i put a drop of ridich in with him as well as a plastic plant to make him feel at home. He’s sitting in a dark room. Will he be ok? What can i do to make him feel better? Should i have left him the tank with the other fish and let them pick at him? Currently have stresszyme in the water as well. I tried feeding him a couple dried blood worms but he didnt attempt to eat it so i removed the food! Help!!