As for Barkat’s claims that he only attacked Eisenkot and Gantz, well—he spent months building the case for a putsch. I doubt how many people on the left, at that point, were saying that Netanyahu was a coward and that Nasrallah could smell the weakness.
Once someone denies attacking Netanyahu and the archives show otherwise, that naturally indicates how much credibility should be given to his denials about the putsch as well.