My son can't tie his shoes, wash himself, brush his teeth properly, spit (he swallows his toothpaste), button a shirt, or brush his hair. I have repeatedly and patiently showed him how to do each of these things many, many times. He only lives with me half the time. He has lived mostly with his mother until the last 2 years, when I got joint custody. He has been diagnosed with ADHD and started taking quillivant 2 months ago, which has helped him and his teacher (he was inattentive and disruptive to the other students). He often gets extremely angry to the point of violence (throwing things) over trivial things, such as difficulty putting on his shoes, or buttoning a shirt. He also cries about trivial things at least 4 or 5 times a day. Mealtime is a nightmare unless he has one of only 3 meals he likes. I have talked with his mother but she thinks he is just fine, and that there is no need for concern. I owe it to him to be the best father I can be. Can anyone here tell me what I should do?