Even difficult unwanted transitions are usually seen differently in retrospect than in real time. A psychologist called Fela found that 90% of the people he spoke with about their life changes they ultimately judged their transition to have been a success. Unpleasant feelings fade more than pleasant feelings do and it's a phenomenon known as "fading affected biased yeah fading effect bias" I think struggle and change really pushes the kind of limits of how your brain sees the world.