This is not true. America was the country that went hardest on new technology, the issue we are seeing now is that it isn’t the 2000s anymore and consistently evolving CGI like Pixar and DreamWorks were doing is basically a dead end. Only so far you can go realistic, something that is also heavily apparent in gaming.
As for animation, the bigger issue is that franchises like the MCU kill any reason to invest in animation exclusively. Most of the animation tech race was more to hit the point of realism for the blockbusters, as people want to see real superheroes, not cartoons.