@Burpeesshmurpees Sorry to hear your son is in a difficult situation. My thought would be to tell your son that this other child is still learning about how to play well with other children. If the child hurts him, say "I don't like it when you hurt me" and go to the teacher straight away.
Do you know the other child's parents? Any idea how engaged they are with the school? They may be doing all they can and just holding on for the 1:1 funding. If you have good communication with them, gently ask if you can chat and get their advice on what strategies or words your child can use to deflect any hurting , or what the possible triggers may be for the other child. Try to listen and be supportive, he parents may be under strain and may worry about their child being isolated or ostracised.
Hope things become smoother soon.