Irrelevant to how poor the U.S. men's national team fares on the world stage compared to the U.S. women's national team.
Though the above point is obviously correct, some context is relevant. In most countries, men's 'futbol' has long been THE sport and most of the very best athletes gravitate to it. In the US, 'soccer' is far down the list in sport popularity, though nowhere near as far down as it was several decades ago, and most of the very best male athletes go into American football, basketball, baseball, etc. Thus the US men's World Cup teams hold a small fraction of the top athletes but play teams that have far larger share of their country's best. We shouldn't be surprised at the modest results. It reminds me of ice hockey 50-60 years ago when the NHL was almost all Canadians; the US men couldn't really complete.
Women's World Cup is more recent, 1991 compared to 1930 (and FIFA was involved with international competitions decades earlier), so countries outside the US had less of a head start. Also, the professional sport opportunities for women in the US are very small compared to those for men, and I'm confident that women's soccer's share of the best US women athletes is far larger than men's soccer's share of top male athletes. The results are what they are, but there's some apples/oranges comparison as well.
On average, men run faster, kick harder, would outcompete for headers (usually being taller), have bigger goalkeepers - the women might not get embarrassed, but I doubt they would beat the men very often.