not a natural politician and completely lacking in charisma (so needed these days).
Also bizarre tactics..demonizing the just past leader (no matter what you think of him) when 10 million plus just voted for him in '19 and Labour needs every one of those votes.
Could have set out to untie all Labour factions..doubt division in this case will conquer.
But you know my view..UK electoral system is bloody undemocratic..how can you have an unelected Upper House??
Love Oz's system that eventually elects a government with small majority that reflects the popular wish...and 3 years only so they have to tread warily plus a power elected Upper House with numerous independents (Greens !

)
and no
New Frigging Labour 
and Conservatives who are to the left of current UK Labour.
Founders were able to look at the mistakes of the UK, USA & Europe and carve out the best system (New Zealand pretty good as well)