It's difficult to know what to do for the best and it's easy to fall into the trap of trying to work out all the 'what ifs'.
As soon as Sukei was taken from the wild, there was no going back. And sure, he's been through a lot to get where he is now but it could have been a whole heap worse. He is in a good home with a family that loves him dearly and who moved mountains to get him home with them... where others may have simply given up and left him where he was because it was too inconvenient for them to fight the battles you had to fight.
He doesn't know any different. His life (other than he early part) has always been with you, your family, & your environment. He is in the best place he could be with his background and I think you should be proud of everything you overcame to get him there.