I think the problem is party members of all parties are delusional.
Its quite possible that the party system never worked but in the past before social media or even when there were only 2 tv channels, there wasn't this endles chit chat and personality drivel.
There were headlines about some change in say Tax, or new Traffic regulations, and those people who were impacted either way would remember that as a plus or minus in terms of the next GE.
But with the growth of mass media, first tv then sm we get an endless diet of quite honestly irrelevant stuff by media air heads who have to fill their time slot.
And nearly all of it isn't about the nitty gritty of people's lives, eg why pot holes are a genuinely big issue. Because the parties now live in the media world. They are trying to catch the eye of whichever media pundit they think will have influence.
So on one level this is also why Brexist was, still is so important, because ordinary people were part of making the decision.
And then it went wrong, and instead of saying maybe we the voting public were too gullible or didn't ask the right questions, the politicians are again shown to be incompetent or not keeping their promises. Rather than the fact that the voters excepte false promises.
Obviously people who experience the ongoing downward spiral of the UK (which probably no politician can solve) more than others ie "the working class" are more likely to be anti which ever party is in Government at the time. In the last century the traditional working class vote was in fact Tory. Just because original labour was seen as the product of the trade union movement didn't mean it was seen as suporting the working class.
So their Tory vote swung to Labour when it turned out (MacMillan) "you've never had it so good" obviously hadn't "trickled down" to the working class.
So taking a punt on Reform to make it better for them is more a rejection of the 2 major parties because in the past century they have been in power and what have they done for the working class.
So I think Labour (or even Tories) thinking they can some regain trust or crediblity isn't about this or that policy, but about the fact neither party has improved for the long term and continuing those at the bottom end of the wage market.
The problem is no one who is committed to politics (which on one level should be the basis on excluding them from politics because it is their hobby) is going to be brave enough to stand back as say lets just stop and really look at issue and how, if at all they can be solved.
The party games of party politics means we are just the outsiders to a game where people are obsessed with their world, not the reality of how life is lived.