I don't get the hate. They played well today, but as Andonovski said, sometimes soccer can be cruel. They also played a very good team in Sweden.
The US team has won 4 world cups, but it's not like you can count on winning every time in competition like this.
The USWNT won four in the eight-tournament history of the event and had won the last two in a row. As of now, half the women's World Cups have ended with the USWNT taking the trophy. That's just crazy. That's noticeably stronger than the dominance Brazil's men's team had when Pelé was young, winning in '58 and '62, and then putting together the greatest soccer team the world has ever seen in '70.
As I've said for decades, soccer is the cruelest sport. I think it's because the scores are typically so low, with the most common scores in games being 1-0, 2-1, 1-1, and 0-0 (where I've put together, for example, the home team winning 1-0 and the visiting team winning 0-1 as "1-0"). With such low scoring, one crazy bounce or one player having an unexpectedly great or terrible day can completely change the outcome. This happens a lot less in, for example, basketball, where typical NBA scores nowadays look like 116-113.
There was a time (mid-aughts) when my favorite soccer player to watch was a woman - Brazil's Marta. In every game I saw her play, she did "this-kind-of-thing-only-happens-in-video-games" stuff. She was quite clearly the best female player in the world for a good decade, but that translated into zero World Cups for the Brazilian women's team, in part because the USWNT was so strong. An international group of guys with whom I discussed a lot of soccer via reply-to-all e-mails from the late '90s until 2014 had a bunch of people who liked (ugh) French soccer and felt obligated to put down Brazilian soccer at every opportunity. But even in that group, most agreed when one guy said he was sad about Brazil not winning an Olympic gold medal (2004, I think) because Marta deserved to have a gold medal. My reply was simply "it's too bad Cristiane didn't, or they'd both have one."
By the way, idiots cheering for their national women's team to lose is not limited to the USA. Brazilian idiots did quite a bit of that last week too. Of course, for stupid political reasons, a lot of those same idiots were also cheering against the men's team in the men's World Cup last year too.