I'm being trolled here. Occam's razor.

You think, in a quote where Biden was obviously already flustered, shitting the bed, misspeaking, and stuttering, that:

• Actually the parts that are convenient for your weird narrative, he wasn't misspeaking
• He chose this moment to tell the world actually he wouldn't have (or didn't, as you posit) pick her for VP, despite proudly bringing up that he picked the first black woman for VP whenever he has the opportunity
• He would publicly call his VP unfit to serve as president, despite now endorsing her immediately after dropping out of the race
• All in the face of multiple statements he and his campaign have made before and after this, which contradict this weird narrative you seem to believe

And not just that:

• If you infer one word where he was clearly slurring (which you already pointed out), it would clarify the meaning of what he's saying to something that would actually make sense for him to say: "Look, I wouldn't have picked Vice President Trump (sic) [Harris] to be Vice President, [if] I think she's not qualified to be president, so let's start there. Number one."