I think his biggest obstacle is himself. He can recover from this, but it would require for him to stop being so aggressive and even hostile towards anyone who offers advice or criticism, as well as learning to cope with people who oppose him. He would also need to be more cooperative with others and even be willing to help others without any direct or immediate gain to himself.
It's incredible, TOH, that in reading this without knowing who this person is, if you had to visualise your perfectly well trained male Jehovah's Witness primed to become an elder you couldn't find a better descriptor than this.
I know, I know, it's considered the lowest hanging fruit to ever hurl the "you're still in the mindset of a JW" at anyone. Our version of Godwin's law by whose standards the thread has come to an end and we've lost the "argument". But in this case the comparison is just so obvious it smacks you right in the face.
It's probably why so many of us always found Lloyds behaviour so triggering.