The pilot reported that shortly after takeoff, he had difficulties maintaining a ground track due to a direct crosswind, and the airplane subsequently struck the tops of trees, about 20 feet above ground level. Unable to maintain airspeed, he elected to land the airplane in a field. During the forced landing the airplane impacted several fences and ditches. The landing gear collapsed, and both wings and empennage sustained substantial damage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.