You just can't help yourself can you Elodie. And it's not just you. But it is people like you who have destroyed labour. What you get out of this I have no idea. But if your real goal is to get labour back in power, then, and this isn't just a message to you, it's a message to all people who conduct themselves like you do, labour is never going to get back into power with people like you at the face of it.
Why not start with listening to what people have to say. Try to understand why the working class, in those neglected pockets of the UK felt they needed to get out of Europe. Why they felt that the Labour party does not care about what they need, until it comes to voting day. Why they feel that even though the Tory party is a poor choice, labour is far far worse.
Can you really put yourself in to the situation of other people, the people that the Labour party was set up for, and understand why they have now rejected labour?
Try doing it without resorting to the first response that they're thick, uneducated, misinformed, like turkeys voting for Christmas. It's not that. It's something else.
Are you able to reflect and really think about what the real reason is? There's lots of hints on this thread that can guide you.
You may not like it. But try not to be so blinkered that it prevents you from understanding it.