NEW FAIRFIELD—Schools Superintendent Alicia Roy’s decision last week to leave her position when her contract expires next year comes after years of mounting criticism against her leadership. The first public rumblings against the superintendent began with a petition in summer 2015 demanding improvements to the district’s special education program, which petitioners characterized as “broken and callous.” “The New Fairfield Schools Superintendent has constructed a Special Education Department run by an administration that is unprofessional, unresponsive and downright hostile to the needs of our children and our families,” the petition read.