Er, folks. If your argument is that in her first set-piece interview, she screwed up her communication and message completely, that does not count in her favour.
She'd had weeks to prepare her message. She botched it instantly.
1. Hundreds of thousands of members gone
2. Initial media hype and public fascination, leading to a huge short term bounce
3. Quickly followed by a long term CRASH, as the public truly get to know her
Before blaming the left for 'sabotaging' her, resigning, and ending up on a sofa as a pundit before you can say Liz Kendall.