Well you're facing an uphill battle for sure. But the key for IMGs in derm is research. In 2016, I believe 9 total IMGs matched into derm. Their scores were average (~220s, 230s) but the average number of research publications/presentations was like 16-17. This data may have changed in the past few years, but I'm quoting from memory from Charting the Outcomes for IMGs which you can Google and peruse at your leisure.
So long story short, if it's something you're truly passionate about and don't want to do anything else, then I'd be prepared to buckle down and do a minimum of 2-3 years of research at a program that either historically accepts IMGs or has enough heavy hitters to make calls/write letters on your behalf to get you interviews. And while there, destroy every assignment and task. Make them see that you'd be an asset to them and the field. But even then, there's no guarantee. The tough part about this would be to put off paying your debt for a few years with nothing promised at the end. But if it's truly your dream, I'd at least go all in on it for a few years and live with the results. It's a tough path, not gonna lie. But somebody's gotta do it, why not you? Best of luck.
