While i abhor Bush Jr, I would put Reagan as #1. He paved the way for Bush Jr. And Biden. IMO Bush Sr is tied for the #3 spot simply for pardoning members of the Iran-Contra affair.
Nixon is one of the worst presidents we’ve ever had though, and I would put him higher than any of the others. The “war on drugs” caused so many rippling horrors domestically. And those horrors don’t compare to what he did abroad.
The person you’re replying to never even refuted the claim about China. Many people don’t know about the 13th amendment, so it’s actually relevant to the conversation. Your weirdly hostile reply isn’t relevant because it’s reductive and misplaced. If you truly cared about forced labor, you wouldn’t be trying to squash conversation about it.