> I believe strongly that maladaptive behaviours like tantrums require the presence of another caring, supportive person to help establish and nurture positive

> I believe strongly that maladaptive behaviours like tantrums require the presence of another caring, supportive person to help establish and nurture positive adaptations. If the individual hasn't learned to manage their emotions safely and constructively, it's unlikely that they'll suddenly figure out better ways of behaving without having it modelled or otherwise shown to them. Yes. At those sorts of ages they literally don't know how to manage the emotions they're feeling. Hell, often enough they may be _entirely new emotions_--they don't even know the words to put to them to begin to express them or ask for help. It is absolutely your job as their parent to teach them this stuff. Teach them what feelings are. Teach them to recognize the feelings. Teach them how to cope with the feelings. If you don't, who's going to? Walking away because they're overwhelmed by unfamiliar emotions and haven't learned any coping strategies is just throwing your kid in the deep end of the pool and walking away figuring "eh, they'll either learn to swim or they'll drown. they'll probably learn to swim.".