But, that's pretty much the same as Obito, all he had was Rin, Obito, Minayo, and Kushina. He lost Rin and Kakashi, seemed to decide that Minato never really cared about him, and Madara taught him not to care about anyone, which is why he could care less about Kushina. Obito said he searched the world trying to find something to prove him wrong, but kept finding people like Danzo and Orochimaru who just proved him right, on top of this, Madara convinced him he was some sort of savior. And, like I kept saying Sasuke could seek help.
Edit: Also, that's wrong, it's shown that adults tried to help him the day after the Massacre, and likely for a long time after that, when he never let them, they likely figured he wasn't so consumed by it, Kakashi finally realized it and tried his best.