This is a similar problem to the kingdom bully topic, read it if you are interested.

Throwing competitions,I can tell you that this is not an isolated case.

The best strategy would be to try sorting it out by talking with him on a kingdom level, its best if a kingdom isnt having to deal with infighting, it happens even after resolution, because some players are hot heads, and take the game really seriously.

Well if hes not talking its a problem.You could post in open chat, but he doesnt have to read it or act on it if he does.

Have you any idea as to what his grievence is? Though would knowing this do any good if hes not communicating at all.

Is not bothering trying to win these competitions a solution? Perhaps rather than wasting resources to win the events, just do enough to finish all the reward levels.

Otherwise, maybe someone else can think of some strategy,but based on the bully topic it would seem very difficult to solve.

Guys, thanks for the advice. His problem is he came to our kingdom, joined our clan, and from the start would just rub everyone the wrong way trying to goat the our big players.  I think he was a clan leader in another kingdom and wanted more power in our clan. He would log in but not participate in onslaughts so eventually harsh words were exchanged and he left or was kicked (that I am not sure).  No other active clan wanted him so he then started the crap he is doing.