How has it "completely fallen apart?" It's basically just one person's word against another person's word, and the lunging at the steering wheel claim is just one troubling allegation here. The most serious claim made by Cassidy Hutchinson, involved Trump wanting the metal detectors removed from outside of the White House rally, because it reduced attendance, while also saying of the rioters,
"They're not here to hurt me."
.... as if that made it okay for some of the rally attendees to be armed.