It's probably just because they're good bull****ters. They were just born with the gift of gab and therefore can network and therefore can succeed.
Yeah, who would've thought that social skills are more conducive to success than oh idk, actually working hard and getting good grades? I'm exaggerating a bit here of course, but there is indeed a bit of truth behind every lie, as they say.
Anyway, yeah, I know what you mean. Honestly, depression and anxiety (and mental health issues in general) play an ENORMOUS role in how your life trajectory goes. It's not your fault, there's nothing wrong with you. Things happened, they affect you and how you think about yourself, others and the world... and it just ends up cascading into this spiral downwards where you feel like everything is slipping out of your control. Least, that's what it was like for me anyway. It was a gradual thing. I know i've been depressed for a while, but it didn't get this bad until about 3-4 years ago.
Honestly, and I know this gets repeated a trillion times, but don't compare yourself to others
. Most people don't really know what it's like to be depressed. They were fortunate enough to be relatively ok mental-health wise, and that gives them a pretty big advantage in society, like making friends, dating, getting a good career, whatever it is. None of this is your fault. Sure, all of us could have tried harder at life, but I'm sure we did the best we could given our circumstances and capabilities.
Sending my love and support to you. <3 Hang in there, because a lot of us are going through the same thing.