On the subject of Labour disenchantment with Starmer, people say that Labour doesn’t topple its leaders and that it’s never happened.
I’d agree that the Tories are more ruthless and more likely to bin a failing PM, but everyone seems to have forgotten Brown’s coup against Blair. IIRC there were rolling ministerial resignations. Blair ended up giving a timetable for his evacuation of No 10.
Labour’s in a different position now because there isn’t a particular thwarted, bitter mentalist like Brown plotting away. But there is apparently a lot of discontent and there are plenty of ambitious people around, as ever in politics.
A few junior ministerial resignations and it’s game on.