You have been refreshing this petty excuse for a bath tub for weeks now. It is time to give it a rest ;-).
You could try killing him everytime he tries to refresh the boat? The process for it should be enough for the murder should you be prepared.
lol, I might know the owner, seems the anchor is broken and stuck in the down position and the keys broke off in the plank locks!
Aaand we've got competitors, or perhaps wasted seamen interested in joining the ranks of the Fishermen Union?