Comparison with others is one of the most reliable ways to lose satisfaction you already had. The mechanism is specific: when you compare upward, you raise the invisible standard against which your own circumstances are measured, and what was previously enough quietly becomes insufficient. This is not a character flaw or a failure of gratitude.
v Most people trying to feel more satisfied with life are working on the wrong problem. They are focused on what they need to change, acquire, or achieve, when research suggests that circumstances account for less of lasting wellbeing than most people expect. Sonja Lyubomirsky and colleagues proposed a model identifying intentional activities, deliberate, varied
People ask me whether never being satisfied is a good thing, and the honest answer is that it depends entirely on what the dissatisfaction is pointed at. Some of it moves you toward something specific and stops once you get there. The other kind never stops, because the finish line keeps walking away from you