Assuming you're truly, on paper, as good a candidate as you appear to be, and assuming you aren't odious to behold conversationally, which doesn't seem to be the case at first glance...then maybe you're just unremarkable in the best possible way.
There are people who do everything perfectly competently, who are pleasant to be around, and who make little to no fuss. We often look right past them because nothing stands out, but really, that's a pretty honorable standard to try to achieve in life. The vast majority of people on earth are noteworthy for insufferable reasons.
As far as practical advice goes, however, you need a job anywhere ASAP. I can only imagine the strain this puts on you and your partner, but here's the thing -- you're not going to be a better candidate when you apply next year. Unlike folks who might benefit from a year of research to put on their CV, or a crack at Step III to show they can take a test well, or perhaps a year of therapy to help people not want to punch them in the face during an interview, you're a good candidate now -- one who got unlucky.
The clock starts on your time not practicing medicine on July 1st. The longer that time period is, the less likely it is you'll get a position. A year not practicing is a professional malignancy. Trust me on this. The good news for you is, some medical students won't last the first month in their internship, a few won't end up being able to start on time for various reasons, and a few programs will 'find' a spot they didn't know about. These things happen much more frequently than you think, and most of the time they won't even be advertised.
You would do well to accept that you might be apart from your partner for a period of time, hard as that is. Ask the PD at your alma mater to watch on the private AADPRT list serv for open slots. You sit down every day and write to 20 programs in family medicine, internal medicine and pediatrics. Pick a state or city and do it. Continue until you've covered the entire country, or someone offers to talk to you about an open slot. Then you go there, work your ass off, then take a PGY-2 spot from a departing psychiatry intern who couldn't cut it -- there are a good handful every year.