Just.....No.
Minutes kneeling on someone's neck, after they are in handcuffs isn't the best possible option. Depending on which autopsy you like, either he asphyxiated due to being kneeled on, or his heart stopped due to complications from being kneeled on.
Yes, he didn't help his case by being on drugs, sketchy, and probably with underlying medical issues, but the police still need to be able to arrest high, sketchy, not medically perfect people without killing them. I've watched the videos. I'm not condemning the cops for anything they did, except kneeling on the guys neck for minutes after he was cuffed and had stopped struggling. Sadly, that directly contributed to his death. So they are culpable for that action. This shouldn't be complicated. You don't get to contribute materially to the homicide* of someone in your custody and just say "oops, he started it." If anything, once he was in cuffs they had a greater responsibility to ensure his safety, because they had removed some of his ability to do it himself. They had numerous options to deescalate once he was in cuffs, and they did nothing at all except maintain the max pressure it took to get him in cuffs.
*BOTH autopsies ruled Mr. Floyd's death a homicide, so I feel it's fair to call it such.