Just going off of world rankings, currently the Internationals could field a stronger 12 man roster than Europe can - that's how bad it's gotten for them.
And there isn't much coming down the pipeline either. The Americans left as many 25 and under players from the top 100 of the OWGR off their team as the Euros have in total. Hovland is just about it in terms of elite young prospects, and the core of the team isn't good enough to make up for that. Rahm has obviously surpassed expectations and Rory will be great for another 15 years, but apart from him you've got Fleetwood and Fitzpatrick who have plateaued or maybe even regressed plus Hatton who I don't think has another gear in him beyond what we've seen already. All three of them were supposed to be core guys, but it hasn't happened yet. So whereas for the past decade the core of the team has been Rory, Sergio, Rose, Stenson, Westwood, and Poulter, now you're looking at Rahm, Rory, and Hovland for the next five or so Ryder Cups. And that's assuming Hovland does become as good as I think he will, which is never a given.
Or, what could've happened is that the Americans all came in this week in great form while the Euros didn't, or it was just the perfect course fit for the Americans compared to the Euros (the inverse of 2018). The teams are both going to look very different in two years anyway, since that's what always happens.