I think you’ve unwittingly stumbled on the crux of the issue with your “basically he wanted to be leader of a group of people who did not want him to be leader.”
The issue is that he had a democratic mandate from hundreds of thousands of Labour Party members for the approach he took. Labour HQ staff had no such mandate. They simply didn’t like his politics and the report is fairly clear that they acted in a factional manner against Corbyn to undermine him and his team, even diverting Party funds during an election to a secret campaign fund to support their favoured MPs. That, for me, is unforgiveable.
But this is exactly what's happening with the Tories. Boris was a membership favourite - Tory MPs then had little truck with him. A bunch resigned, and he got rid of dozens of others before the last election to secure his position. He's still getting rid of them now!
Look what it leads to. Those MPs ALL had democratic mandates - the only mandate with any real legal standing, that of ALL of their constiuents. They were kicked out by the new breed that swept the party.
We are dallying with variants of populism. It's a fucking disaster, because it is deeply at odds with the legal and historic basis of our democracy. It always WILL be a tension.
I give a FUCK about party members in any direction. Mandate, schmandate. Their having their own choice of leader is a wholly modern phenomena. It is open to abuse, because membership to the parties is open. Anyone with a top class social media operation has a chance to take over by swelling the membership to people loyal to them. That stuff costs money and can be hidden from a population completely out of touch with what the Web actually is, and who is paying for you to see their shit. Crucially, it remains largely unregulated.
It's absolute horseshit, and it makes our politics far more like America. Which is the last thing this country ever was about.
This is where it has lead. Boris fucking Johnson! Sabotaging EU membership. Unprecedented cuts and an economic crisis.
Fuck party members. They are nothing compared to the constiuencies of this country. But they've taken over.
Hence, Tory Members will have Liz Truss as PM.
And Labour members would have Corbyn in power. As a face for various people, some of whom are great, others who really don't need serving. At all.
Just like we had Boris in power, who turned out to be there to serve himself, having been handed the crown by others who do not need serving.