I think it’s very close.

Bush launched two wars where the US invaded countries in the Middle East, leading to decades of destabilization in the region and leading to millions dead. His admin coincided with the rise of Fox News and conservative punditry outside talk radio. Patriot act, tax cuts, oversaw the recession, etc.

Israel’s genocide started under Biden, so I can’t exactly put that on Trump even if he’s supported it. This quagmire with Iran isn’t as big as the invasions were.

Trump’s been more damaging domestically with his scotus appointments and emboldening racists, but if you look outside just the US, then yeah I think you can definitely make the argument that Bush was worse.