Teenagers have an under developed prefrontal cortex. This is the part of the brain that interrupts emotional responses and considers the potential effects before acting. Teenagers look enough adult-like we want to treat them as adults, but they also have yet to grow the brain into their bodies.
Toddlers DGAF. Stimulus-response. Galahad is having to deal with the consequences of lack of planning, thinking three moves ahead, and a toddler who makes him pay the consequences.
He was in a bad mood, but he came upstairs to make a showing of his displeasure. Fleur who adores him now has made him sit and watch the same annoying video (we all hate) over and over.
She sounds so happy.
He sounds grumpier. Well, until she has worn him down.
My hope is that experiences like this will help him grow into being more mindful.