Funny!
But, I'll say Joe played his part. He was pushed out, right? Probably he was not even aware that the one-page 'step down from the race' letter/tweet was put out (forged signature and all.)
He was pushed out, and it was his doing to push Kamala as the replacement nominee before the regime was able to decide who it would be. Obama didn't dig that; Joe usurped his puppet master's role. But with 'Kamala fever' spreading, however long it took, a week, 10 days, Obama swallowed and had to add his endorsement of her, an installed nominee (he had preferred some kind of 'competitive process') knowing she'd be a poor candidate. But Joe short-circuited that plan by pushing out Kamala as his presumptive replacement.
Despite the media going overboard praising the Dems convention, it was clear disunity abounded. Kamala skipping the Obamas' speeches, Clintons splitting town after they spoke, Biden gone after day 1 (and early sleeper Joe relegated to a midnight speaking slot.) And none of those folks were there for Kamala's acceptance speech!)
During the campaign, a passive-aggressive act that Joe made sure to be aptured on camera was him beaming while wearing a MAGA cap, and walking around carrying one.
Could go on, but you get the picture. The 'supporters are garbage' comment came during a zoom call at the very same time Kamala was giving her 'closing the deal' speech in DC. Sabotage or not? Bumbling fool or not? You decide. Sure, the staff tried to clean it up, explain it away, but it didn't wash.
Sure seems like Biden pushed her out and then... There have not been much 'joy and vibes' between the two camps, ever, and Doc Jill is said to be rather antagonistic re Kamala.
He was happy, borderline giddy, in his speech on Thursday, two days after his chosen successor went down in flames. In her speech on Wednesday Kamala barely mentioned him. Maybe she gets it; Biden set her up to take the fall.