Interesting complaint considering that as an American you have an easier visa situation than 90% of the world's population. Consider for a moment that a US visa application requires a nonrefundable payment of $160 even if your visa is declined. Millions of foreigners have to pay this fee and jump through numerous bureaucratic hoops even when they're simply connecting through the US and never leaving the airport. Most visa complications Americans have to navigate today are the result of reciprocal penalties our own government initiated first.
I agree. I get quite a chuckle each time an American complains about visa difficulties. They should all be forced to experience the wonders of getting a US visa. Been there, done that several times, before running the Green Card and Citizenship gauntlet. Many of my friends and relatives simply refuse to come to the US for that reason. My Australian and New Zelander friends prefer to fly to Europe via South America rather than touch any US airport. As far as tourist visas go US is about as stuck up as Russia is. A total pain in the butt. Well at least these days, after you have run the gauntlet you often get a 10 year multiple entry visa. back in the days you were handed a single entry visa after all the song and dance, which prevented you even from visiting Canada and then re-entering the US.
The mindless design of international airports in the US together with the odd visa policies is what makes it impossible for US airlines to be anything like the Middle East three, the East Asians or even any European airlines in terms of providing onward connecting service via a US airport.