Teachers, do you ever give up on collaborating with certain parents?

I am a Site Director for a before and after school program so it looks a lot different than a classroom type setting. Our time is structured and the students are separated into K-2 and 3-6. Some mornings, I have as many as 65 students before school. There are a few students in Kindergarten who struggle to keep their hands and bodies off each other. There is one student who does not listen to me or any of the other staff members when we tell him to stop. This is particularly important when the students he is rough housing with says “no” or “stop” but he won’t. I’ve been reaching out to parents but I’m getting push back. They say, his teacher says he’s doing “excellent” in class. He’s getting rewarded by his parents for those things at home. I try to explain that class is very different from before and after school. I’m just fed up and I have so many students to manage that it’s just easier to put up with his behavior than have a back and forth with parents. Additionally, I’m only allotted 30 hours per week and majority of that time is consumed with being in ratio or planning and I often have to do work off the clock. I’m implementing an incentive system for him to potentially improve things. I’m familiar with being looked down on for being in alternative ed / caregiver in a school setting by teachers and parents despite my 15 years experience. I just want to know if it’s fair for me to pick my battles when it comes to successfully collaborating with parents.