The Tories appointing Liz Truss as PM was an enormous own goal that basically sealed their fate at the next GE. Even her supporters must be regretting their decision now as she's made an absolute mess of it within a month. The party members chose ideology over common sense for the current economic situation, and they're going to pay the price. It really isn't difficult to understand that slashing taxes and paying for it by borrowing huge sums of money at a time of rampant inflation is a terrible idea. You can't just rush in and implement ideological changes without respecting the economic circumstances of the moment. Utterly ridiculous.
I really don't see how they can come back from this to win the next GE, I really don't. It's a way off I know, but this is so bad, and the gap between Lab and Con so wide, I don't think it can be done.