In fairness Corbyn fought two elections
Yes...
he was given a good run at becoming PM
No.
Why pretend? The 2016 chicken coup and leadership challenge were before either of the general elections he contested so it's patently wrong to claim he was generously given anything. Furthermore, we know now the most senior staff in the party were sabotaging during at least one of those elections. In what way is that a 'good run'?
It'd be better for Labour to just get the Forde enquiry out asap, rip off the plaster, and admit Corbyn was stitched up. He's not coming back as leader anyway so there's no risk to the centrists in charge now. But trying to rewrite the history just won't work in the internet era.