My longest LTR has been 1.5 years, and fizzled out because ultimately I realized it was more just lust with the most attractive girl I was with rather than qualities that are important for a wife. She was lazy, very spoiled by rich parents, didn't have hobbies beyond "hanging out" and watching TV, but was the hottest girl I was ever with so I tolerated all this.
And yes, if I could find one in the US I would not leave, but for years I have tried the bars, meetups, co-ed sports, and overall my impressions have not been positive. Of the girls that I liked physically, the mental factors were dealbreakers (social media addiction, general apathy about anything intellectual), and so those were a pass for anything serious as well.
Physically, my preference is thinner, taller women (at least 5'7-8") with feminine curves. Kind of like a volleyball player look I guess. I have found it is very hard to find such women in the US that are single and aren't way overweight.
Something like this girl I'd say (just from a purely physical standpoint):
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Where I intend to go has many more girls that look like this than any city in the US I've seen besides NYC and the wealthy parts of LA and Miami.