I didn't know the USA wasn't the first to land on the moon with something other than humans. I do kinda agree with the person above you that it does sound like they were simply better, only we'd never know because the USA made this last achievement into the only thing that's retold and rehashed. It speaks the most to the imagination to roam another world, but in the grand scheme of things...
I had never even heard of unmanned, automated landers making it to the moon before humans! They had some computers and I happened to have picked up that they've sent things into orbit, but predetermined engine burns (with time to apply corrections from the ground) in a vacuum with nothing around you is quite a different level of achievement.
I don't care as much about the history so much as the science and future, but I am a space nerd so I'm actually rather surprised that I never knew this. The USA manages its public image about as carefully as China I feel like, the advantage being that they're often genuinely on the good side (no concentration camps for a minority group tends to help, for instance) but by no means selfless, impartial, or genuine. (The best example of public image management may be immigration desire stats. You'd be foolish to immigrate from a poor place to the USA when you can immigrate somewhere with higher social mobility as well as security, but the number of people in such a situation that wish to immigrate to a place like Denmark is tiny by comparison. The American dream, it's called, not the Danish dream. It's a huge, well-managed PR campaign to look to the USA as a leader, shoving competitors' achievements under the rug.)