Saetana I think that really is Labour's problem. The "traditional" Labour voter had a manual job and was probably a member of a union. Until about the 1950s, the lives of such people were hard and sometimes precarious.
Fast forward 70 years and changes to society in the post-war years mean that those people are older, but considerably more secure. They probably own their own homes outright and have lived through a period of economic boom. Some of them live in towns now in decline and look back with nostalgia to times which seemed better.
Some of them blame the EU, immigration, "wokeness"/PC, students for the disappearance of values which they held dear and a society in which they personally flourished. Why on earth would they vote for a Labour Party which bangs on about food banks and poverty?
Hartlepool might be the tenth poorest town in the country, but the majority of people are not destitute and it's easy to blame those who are for the situation they are in.
The Conservatives understand all that. They won't do anything about it, but they can promise that they will. Hence, the appeal to the emotions with flags and nationalism rather than any coherent economic plans.
Meanwhile, the people who are really suffering are the young, who can't find secure employment and can't afford to start on the property ladder. They are possible well-educated, which is something the "traditional" Labour voter sometimes resents.
Society has gone (and is going) through a period of change. If Labour represents the underdogs, as it has done historically, the people at the bottom of the pile have changed and Labour is finding it difficult to find a niche. Add to that the 10-15% from an immigrant background. Some are discriminated against, so might seem like natural Labour voters, but many of them have come from quite wealthy backgrounds and have natural Conservative values economically and socially.
I desperately want to see a government other than the one we have, but I fear we won't get one if Labour continues to beat itself up about being socialist enough, class warfare and identity politics. It needs to find a way which will appeal to and benefit the majority of the population and that very well mean a total upheaval of traditional party affiliations. In fact, it would be surprising if it doesn't happen at some time, just as it has in other countries, notably the US in the twentieth century. I don't envy Starmer his role.