I'm going to give you the answers you need rather than the answers you asked for.

1) you are way too hung up on this one particular woman. Oneitis is bad, even if it's for your wife of several years. Oneitis is even worse when it's for a woman you haven't even fucked.

2) you'll almost never know why any one particular woman won't fuck you. They rarely know themselves, and they're rarely honest about it even when they do know.

3) it doesn't matter why any one particular woman won't fuck you. Escalate towards sex. If she rejects you, next.

4) you can be Chad and still experience a 70%+ rejection rate. Getting mostly rejections is just the male experience.

none of this stuff is about how to get any one particular woman. It's about becoming a more fuckable man to increase your odds with all women.

And more, but that's the gist at the start.

The idea is simple - women are heavily influenced by the perceived desirability of a man to other women. If she sees that other women want you, something switches on that no amount of game, looks, or status can replicate on its own. It bypasses the logical vetting process entirely. You don't get interviewed. You get pursued.

Pre-selection is real and it operates completely below conscious thought - She wasn't sitting there running the logic. A hotter, younger woman showed up, paid attention to a man she'd written off thirty seconds earlier, and something ancient took over. Millions of years of evolution crammed into one pathetic 180 degree pivot at a beer festival.

Human brains are lazy and take shortcuts whenever possible.

Women aren't as visual as men, and determining if a man is worthy of spreading her legs is for is more mental work for them than our determination if a woman passes the boner test. Note that I'm talking about fucking, not commitment or any of that. Throughout human existence until the invention of the birth control pill, uncommitted sex was a huge risk for women, so the threshold was high. This is mostly instinct and they can't help it without a lot of effort.

If another woman has already done the work of determining that a particular man is worthy, it's sometimes easier to try to poach him than to figure out a whole new man. Even better if multiple other women have done the work. That's why so many music stars who are total uggos still have throngs of women in the audience just hoping to get backstage.

It's why some women, when they see my wedding ring, try even harder to get me interested.

It's why so many women mate poach compared to men (that, and they don't have the threat of violence at the same level we do).