Kids don't act the same throughout history or places. There are cultural norms and differences. You think a kid raised by strict Muslim parents will act the same as one raised by white liberal parents in the United States? They won't. The fact that you just paint kids with broad strokes without acknowledging the historical and cultural nuances is telling enough. I never dreamed of insulting my dad as a teenager and he was nowhere near as strict and scary as Kratos. Both Spartan and Norse cultures at the time prized honoring one's parents and respecting them, unlike today. Insulting your dad (or mom) was completely off-limits.
That scene reminded me of when I went to school and liberal kids would tell me about how they told their parents off and all I would think was, "Holy shit, my dad would have killed me if I had dared talk back, let alone insult him."
Again, no. This would make sense if Atreus was some kid raised in LA. Ask a Greek person from just one generation ago if they would ever insult their parents even if they were angry and get back to me with the answer. The game utterly fails to capture the environment that would shape Atreus into what he is. They just write him like any modern teenage boy, which is nonsensical.