Success is something that can happen at all scales, but right now no success is greater than the fact that SpaceX just caught the booster with MechaZilla on their very first attempt to do so! This is a great step towards reusing said boosters, and the soft splashdown the Starship adds to that as well!
But even small successes count in today's world. If I can help someone on the other side of the world to have less trouble surviving without my help being diluted by a "good cause" that takes its cut just to pay their managers a hefty salary, that is quite a success too.
And even the young lady who is now showing her skills at building a bamboo bridge to her tiny home on YouTube is successful in that she is creating something of value to her immediate surroundings.