I feel like other rocket builders, whether private or government, have way less launches but they have more successful launches percentage wise than Space X.
The only thing that matters is that things do not blow up with humans onboard: SpaceX simply accepted blow-ups as part of development cost, made sure nobody was hurt when they happen, and ended up building a rocket to carry humans to ISS much faster than eg. Boeing who got a bigger grant and is still not trusted to do that and bring them back (having only launched once to ISS last year, and not bringing astronauts back). So both faster and cheaper, and with some spectacle included too (everybody likes fireworks, right?)
They also started at the same time, and Falcon is now considered old tech (because SpaceX has been blowing up their new tech in the meantime).
