Joe Biden is responsible for a genocide in Israel, because Israel couldn’t do it without American support. (And this isn’t his only mass murder. He engineered a famine in Afghanistan.)
Obama said that he and Joe were responsible for making the US the biggest oil and gas producer in the world. Biden has, in office as President, made that brag too, meaning he owns it.
He is also responsible for all the deaths in Ukraine since March of last year, when the US, thru the UK PM Boris Johnson, scuttled a peace deal. As a result, Ukraine will almost certainly wind up losing much more land and hundreds of thousands more dead. Most likely it will wind up a landlocked nation. The IMF and the EU will then loot it to the ground with neoliberal policies.
Never let the US use you as their proxy in a war. They always fuck you over.