I’m in the exact same boat, except I only recently started (1 year ago) my journey to diagnosis after learning that I’ve had anxiety and depression for most of my (30 year) life without knowing that the gloom in my life isn’t normal.
Now I think Adhd might be the reason behind it all, as so much of what I’ve read about Adhd fits with what I struggle with.
I always just lived my life thinking everyone else’s life was just as shit as mine, because I didn’t lock myself in the bedroom like “real depressed people”.
This is how I feel about it as well, but as an autist, I’ve learned that neurotypical just mean it as a greeting, and nothing more. It doesn’t matter what you say, they just want a “hello” in a structured way.