Successful partnerships between families and schools can substantially improve children's success in and out of school. Yet parents of autistic children often report considerable challenges with their children's education. Almost no research, however, has examined autistic parents' own experiences. We, therefore, sought the views and experiences of autistic parents' interactions with schools for their autistic children. We conducted semi-structured interviews with 31 autistic mothers of autistic children engaged in education in Australia. We analysed the data using reflexive thematic analysis. Autistic mothers repeatedly expressed feeling like they were in a 'war zone', fighting ongoing battles to gain the necessary support for their autistic child and were 'sick of being [viewed as] the problem'. They also felt that their expertise as parents -- and experiential expertise as autistic parents -- was often overlooked or ignored. All of this had negative effects on their and their children's mental health. Despite these negative experiences, autistic mothers who had experienced positive interactions with schools highlighted the importance of mutual respect in establishing and maintaining successful school partnerships and how their own determination and self-advocacy helped to foster these relationships. This research sheds light on the critical ingredients of effective home--school partnerships for autistic families.