My parents made my depression worse by ignoring it, only adding to the snowball.
As mean as this may sound, forget your parents. They won't always be in your life. You need to do this life thing on your own. But that doesn't mean your alone. Get some friends or like-minded people to help you achieve whatever you think will make you happy or successful.
And like I said earlier, I'm always here. Feel free to send me a message or whatever and I won't judge you for it.
They knew, and they tried to deny it.
Parents are funny. They all want life to be perfect, especially for their children. However, if anything comes up that messes with their "perfect" life or whatever, they sometimes don't know how to deal with the issue.
Like I said, forget your parents. They won't get you out of your depression, only you will. And I know it might look like life isn't worth living, but find something to live for and do small things till you get there. You'll see that everything gets better.