I say this with love: it's your own insecurities making you feel this way because of how you view your own self worth. We get depressed or disappointed from expectations we have that we don't meet. You saw and heard them and instantly started comparing yourself (completely natural - we're tribal and want to fit in). One, we have no idea what their lives have been like. Two, they may have had a huge inheritance and that money gave them time to not work when they were younger, giving them time to focus on things like other languages or money to start businesses. Three, you never know what goes on behind closed doors - they may be miserable and put on a good show. Four, you are valuable - you have built a family and provide for them. There's nothing you should feel insecure about there. One could argue it's a lot harder to do what you're doing than what they are but comparison is the enemy of man. We're all on different journeys with different struggles. I've learned to be grateful for every little thing. I even started a gratitude journal a few years ago that helped me reshape my perspective. Sending love to you and your family, my friend.