Pippers should you make the choice to leave that is up to you but don't go away mad because people here are trying to help.
You have had this snake for too long to just now start asking for help.
You husbandry is way off in every direction.
Either take the information given to you to try and help your animal, give it to someone that is will to make the changes, or take it to the vet for one last ride.
AND BTW I would guess this is your last attempt because yu didn't get the answers you wanted from your vet??