I went all through the Tory replacement years, and that was down to infighting, a talent thought to be exclusively Conservative. Boris was chosen to deal with Brexit because he was good at winning things, then expected to step down and hand over to Sunak, only nobody told him. Covid messed things up, then the back stabbing started in earnest; he resigned with much help from Labour, then the shortlist was presented but only to MPs; exasperated party members were only allowed to choose between two, Sunak and Truss. Not doing as they were told, they chose Truss. Another PM shambles; when he bottled out he left the field wide open.
The Labour shambles seems different; it is the members and the labour electorate who are dissatisfied/ actively dislike Starmer, not the grandees. Much more grassroots dissension.
No idea how it will play out, but you are foolish if you believe it is all down to the nasty press. Much deeper than that, plus there are other parties to play with.