I can't help, but I can validate that concern that it sounds immature, stupid, or whiny to talk about it. I know any time I let myself feel similarly I can just hear in my head, imaginary voices of critical people I've known in passing saying "Aw, waaah, waaah, my parents didn't love me waaaah - grow the f-k up already"; "No one gives a ***** about your silly-***, adolescent emotional problems, get over it and move on like an adult"; "You were 'emotionally neglected'? I was beaten every day and raped every night since I was a toddler, you don't see me complaining. I haven't even cried in 20 years!"

It's kind of a confusing thing: clearly, it's affected people like us, but no one takes it seriously. It's seen, maybe, as only because of this new-agey, self-esteem, peace-and-love type of child-rearing, the entitled "wimpification" of modern children, that emotional neglect even matters. It feels like it shouldn't matter, when other people experience so much worse. Or like, they're just emotions, who cares? In the Real World, no one's going to coddle your widdle feewings, so why should your parents? They're preparing you, toughening you up for a world that doesn't care if you die tomorrow.

Okay, now I'm rambling and almost justifying it to myself...but I feel you with not knowing how to overcome much. I believe I experienced something similar.