Why didn’t Jeremy Corbyn win when his plan was to raise taxes on the wealthiest individuals and companies to fund better public services for everyone else?

From what I’ve read, Labour under Corbyn proposed raising taxes mostly on the top 5% of earners and large corporations. The money would go toward improving public services (things like reducing NHS waiting times, reducing the cost of university and childcare, investing massively in improving our transport and infrastructure) with no tax rises for the vast majority of people. That seems like something many voters would support, especially after years of austerity. So why didn’t this message break through? Was it about trust, leadership, media portrayal or doubts about the policies themselves?