The US is orders of magnitude more developed in soccer today than it was 40 years ago. MLS, the MLS Academy system, kids heading off to Europe at younger ages, players all over the top flight Euro leagues, etc. It's not even close.
As for "sucking", we're a top 20ish team in the world and would be about the 10th-11th best team in Europe. We're like a Switzerland/Denmark, and few would say that they "suck" compared to the rest of the teams in Europe. We're not a truly elite team, but we're much better than some want to believe.
Sucking is a relative term. The US is, generally, an athletic development behemoth. However, in soccer, we keep hearing that we're about to not suck. Then, perhaps, we might beat some tiny developed nation the size of one of our cities in a friendly, or we might win by a goal in a tournament against some 3rd world nation. That nation's leading export is sweat, and they use a coconut shell instead of a soccer ball for their national team because they can't afford the real thing. Everyone gets excited. Then we lose to that uninhabited island someone is tariffing the crap out of, bested by a bunch of penguins ... and everyone's angry and saying we suck again.
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