Saying you don't like Corbyn's policies isn't the same as saying you don't like all Labour policies.
Despairing of Corbyn's Brexit stance is not the same as rubbishing that of all candidates.
The distinction is vital because Corbyn may seem like a fixture, but one day he won't be.
LibDems: a bit of a wrench, but needs must.
Centrist Labour: probably a step too far, but might consider it.
Corbyn's Labour: miles too far. Too big an ask. No chance.