Swansea City shareholder John van Zweden is frustrated with ADO Den Haag over their sale of Jens Toornstra to FC Utrecht.
Van Zweden says Swans boss Michael Laudrup was "crazy" about signing the midfielder.
"What a bunch of morons. You sell your best player for €950,000? You cannot do this against the supporters. My whole day is ruined," he said.
"A third goes to ADO, third goes to Toornstra and a third goes to the agent of Toornstra.
"And ADO does not even have a resale arrangement. How can that be?"