I think you can be proud that the Usa advanced the group stage.
Last World cup they also showed some promising football.
This World cup they showed some good football and willpower.
So maybe next World cup you have a new starplayer and reach the finals!
Finals? Unlikely, many counties that have way more experience and a larger pool,of motivated players and a better teamplay (1 or 2 good players mean nothing, even 11 good players mean nothing, it's about the teamwork) have tried and failed.
Mostly it's Brazil, Spain, Portugal, France, Italy, Germany and the Netherlands that make it to the finals. And the occasional others but usually a South American or European country because they have far more experience.
They will need several years to even come close to the level of experience needed to even stand a chance to reach semi finals. And on top of that they need a serious training in what this word 'team play' means. Altough they are lucky in that, many countries struggle with being a team lately.