Your post reminded me of a mantra I use often, “Comparison is the thief of joy.”
Trying repeating it to yourself whenever you go down that road. Don’t let online (or real life) “perfect” people steal your joy in who you are and what you have accomplished. You can not know what struggles they have behind the facade, or what it is really like to walk in their shoes. If they don’t have challenges yet, they absolutely will, because they are only human, just like you.