Serious question here. Aside from presiding over the obvious end of a tired administration, what's Sunak done that's so horrific to the rank and file Tory MP that they'd submit a letter of no confidence when BoJo was seamingly allowed to get away with significantly more before they ultimately decided to hit send on the email.
Sunak likely can't win the election, but are there people in the CPP that genuinely believe anyone could win this election right now? It's the end of days for their time in government, and if they truly cared about the governance of the country, they'd be pushing for a GE.