It's only a problem if they aren't actually content. I've known tons of people working minimum wage who sneer at "elites", don't seek higher things, and get high all the time, but really resent the fact that they never did anything with their lives. They don't build their hobbies, they don't seek higher levels of employment or skill, and they constantly talk about how they want to do great things that they never do.
There will always be an infinite amount of achievement that you never accomplished. There will always be an infinite number of things you never did. The best thing you can do is prioritize, accomplish the things that you really want to accomplish, and try to do your best to be happy with what you are able to do. Live your life happily, and make the people around you happy.