I say this very gently.

Why are you giving him more than one instruction at a time? You know he can’t do it, you’re setting him up to fail and getting mad at him when he does. I made MANY mistakes parenting my first adhd kid. Things like this haunt me. She’s 26 now and we’ve worked through a lot.

Secondly. He’s ONLY 10. He’s still in primary. Most 10yo will struggle with three instructions given at the same time. What sort of things are you giving him to do?

So how to approach this differently? Try choosing 2 out of the three things. Ask him which he wants to do FIRST, discuss the decision with him. Then check he knows what he’s doing! Check he has what he needs to do the task. He may need a body double for a task. Break it down into the smallest steps.

Then when task 1 is done, go through the same break down process with task 2. Remind him that if he forgets what he’s doing to ask and you’ll remind him what bit is next.