There has always been a huge gap in the interest of the Ryder Cup between the European players and the Americans.
Europe's team is never as deep, with the bottom 4-6 spots on the team filled by guys who aren't serious contenders to win a major championship in their careers. This makes the Ryder Cup the most important event of their lives. There is no one on the American team for whom that is true . . . they are all dreaming of majors and individual glory.
Meanwhile, the stars on the European team have always loved sticking it to the Americans . . . partly because the PGA Tour treated them so badly, and partly because the Americans are so self-assured.
The other disconnect has been the whole issue of who makes the $. The European team's winnings go straight to supporting the European Tour . . . but the American half of the event is owned by the PGA of America, not the Tour. [Indeed, the PGA Tour now makes 15% off the European team and 0% off the American team.]
The 1950s generation of players saw themselves as PGA professionals first and Tour players second, so in their world the money going to the PGA was appropriate, but that's been out the window for a long time. So, as the event started to produce more money in the 1990s, the U.S. players rightly started wondering how the PGA of America was using all those millions of dollars. And the media [and fans] ALWAYS in all sports finds a way to side with ownership and criticize the players as greedy, just as they've been beating the drum about LIV this whole time.
It was always hypocritical to demand that the players "represent their country" for free, when there was $ being made.