At the time Biden served in the (GOP-controlled) Senate, and not on the relevant committees there.
Do you have evidence that Biden specifically was involved in negotiating about this? Or do you just mean that, insofar as he was a member of the Senate, he “helped” by voting for a ~250 page bill that passed 96–1?
"he used his leadership role to limit the ability of other Democrats who had concerns and who wanted the bill softened"
"Senator Biden supports legislation that will fall hardest on women,” she wrote. “Why? The answer will have to come from him … He is a zealous advocate on behalf of one of his biggest contributors – the financial services industry.” -- E Warren in 2005
This 2005 bill would have passed with or without Biden. If you want someone to blame, this ~200 page bill was written by Chuck Grassley (R) and sponsored by 10 GOP senators and two Democratic senators (Biden is not on that list). The House version was written by Rep. Sensenbrenner (R) and sponsored by 80 GOP members and 8 Democratic members. Then it was signed by George W. Bush (R). This is exactly the kind of bill you can expect when the GOP gets unified control of the congress and presidency. https://www.congress.gov/bill/109th-congress/senate-bill/256
It’s fair to criticize Biden for voting for this bill, especially in the context of the Democratic primary – Elizabeth Warren is much more aggressively pro-borrower, and in this case Biden was actually on the Judiciary Committee where this bill was debated so could have conceivably have spent his political capital making a big stink and trying (unsuccessfully) to sink it – but even then this article is pretty exaggerated / out of context: 2019 clickbait trying to attract views by speculatively scaremongering about intra-party differences.