I think the word seemingly there is doing enormous heavy lifting. Which is to say that people promote only the good things about their lives, their successes, and never their misery nor failure. That's why I come here more often than I log on to FB. We can be honest here, there is no "personal branding" by which we are trying to audition for a better job or whatever.
I have examples from my own life where I looked a hell of a lot better on the outside than I felt inside. It's through therapy and dedicated meditation practice that I learned that we are all fucked up, severely, just in different ways. At the same time, I still compare myself to others; I just know it's a fool's errand now when I do sol, lol. So it's very human to look at others and see an image that looks perfect, but it's also very human to try and maintain appearances on the outside while one is falling apart on the inside.
I don't have the power to alleviate your pain. If I did, I would do so for everyone on this site. What I can do is reflect on it, and cultivate habits and views that recognize and let go of what I call second-order pain. The first-order pain is when life is shit. This is naturally cause for sadness, hurt, and anger. The second order pain arises when I expect to not have shitty things happen in my life. They always happen to everyone, regardless of wealth or status. So, since "happiness" is unattainable, what I've been moving toward lately is to find little moments of joy amidst the chaos.
I might be kicking the can down the road, but it's definitely been easier to get up in the morning when I'm doing something that feels fulfilling, for example my volunteer work with the horses (okay and also the people but it's really about the horses for me, lol). When the familiar darkness of despair starts to roll in, I call up images of what moments of joy I can extract from a painful existence. It's kind of like learning a skill, but the skill is to put the problems down for a minute or many minutes to do something that nobody is coercing us to do. Maybe there's a better way, but this is where I am today.