I'm not going to make a statement on the morality of the death penalty.
But I will instead say this. If this is as painful as the original post makes it out to be, it's probably still a far nicer death than the rest of us will get to experience. Odds are, several of us who have posted in this thread will die super slowly and painfully from cancer eating us alive from the inside. Possibly it'll even be covid that makes us slowly drown on our own fluids over the course of a week. Maybe if we're "lucky" we'll die instantly from a car crash and barely register the pain.
The only question I have is this because I honestly don't know the answer: are prisoners rendered unconscious before they administer the lethal drug? If so, could their brains even register any potential suffering in their final moments? The gasping for air and froth might not be a sign of distress but rather an involuntary response of the body trying to stay alive? And if they're not rendered unconscious first, why the hell not?