I think it's clear that James and Hunter Biden are sleazy. But being sleazy isn't a crime. And as noted in the same article:
"There’s no evidence that Joe Biden used his power inappropriately or took action to benefit his relatives with respect to these ventures. Interviews, court records, government filings and news reports, however, reveal that some members of the Biden family have consistently mixed business and politics over nearly half a century, moving from one business to the next as Joe’s stature in Washington grew.
None of the ventures appear to have been runaway successes, and Biden’s relatives have not been accused of criminal wrongdoing in their dealings."
https://www.politico.com/magazine/story/2019/08/02/joe-biden-investigation-hunter-brother-hedge-fund-money-2020-campaign-227407/