I'm scared of when my kid gets older

My 7yo has ADHD/ODD. He recently started Strattera (works for my husband) after we tried both Guanfacine and Ritalin to no significant effect. We started limiting his screen time more but he does get some (1 hr at a time, a couple times a day). We need a break too as he constantly whines about being bored and tries to get us to entertain him 24/7.

Anyway today I wanted to play a new video game with him in a series we both like. He was doing fine learning the controls, but if he's not "perfect" he gets frustrated and it got out of hand. He was having a meltdown, so I turned the game off and said that was enough for right now. He flipped out and started screaming and hitting me.

His explosive anger is so hard to deal with. He says things like "no one likes me!" and "I did nothing wrong!". I mostly let him burn out the anger and ignored his outbursts as much as I could. But I'm so tired. I'm scared of when he gets older that his anger could get worse and he could give me real bruises. My husband and I don't know what to do. Finding the right meds takes so long. I'm thinking of putting him back in therapy.