Why people are so radically different from us?

I see it as if you are in a world with a different language and you speak to yourself and someone from another world attacks you with a different language, because of a misunderstanding, but you are in two completely unrelated worlds, and if you try to explain yourself to the other, you will waste your life without him understanding you, I see it as this complexity, call it trauma or whatever.. makes life complex, it is not loneliness, but being tied to others always, one way or another, it's a real torment.