When Edith Zemirou bought Euro Disney stock two decades ago, she expected a decent return and her own small share in Mickey Mouse magic.In 1989, the Walt Disney Company announced a public share offering of its young European arm. She heads Euro Disney’s investor club and is one of 1,000 or so investors who are furious at the way Euro Disney, which is raising fresh capital in the face of insolvency, has been run. Euro Disney managers say the firm has struggled because initial projections were too optimistic and the park borrowed too heavily.