They definitely didnt help, nor did the right wing media or the Labour Party centrists undermining him
But ultimately he lost because of Brexit.
In his first election, despite the pressure against him, he took the Tories to a hung parliament and forced them to make a deal with the DUP. Cos people were sick of Austerity and liked his domestic platform
But when managing Brexit became the main issue in 2019(?), Johnson had a really strong message of ‘oven-ready brexit’, ‘get it done’, and Labour didn’t have a coherent strategy. They didnt want to go full ‘reverse it’, cos lots of votes for Brexit came from Labour seats. They also didnt want to go full ‘get out deal or no deal’ because generally the left and progressive voters were anti-brexit.
Corbyn was elected to the leadership on the strength of his domestic and anti-austerity policies, and when the focus shifted to Brexit he was out of his comfort zone.
That’s my analysis anyway. I liked Corbyn’s foreign policy, but it wasn’t what built his popularity
I’d like to recommend The Trojan Horse Affair. Its a limited series and a few years old now, but a a really interesting listen
Its about the scandal in the UK in 2013, where an anonymous letter ‘exposed’ an Islamist conspiracy in Birmingham schools to radicalise children.
The investigation in the podcast is helmed by two people; a rookie journalism grad who is muslim, and an experienced white journalist. The contrast in perspectives and emotion between them adds to it
And yeah it’ll probably make you angry, and for those not in the UK it might key you in a bit on the tensions that do and don’t exist with British Muslims, how they’re viewed and treated by lots of parties here (including the Government)