They definitely are, but being a single issue voter is legitimate so thems the breaks as they say.
Your points are sound and logical but I don’t agree they are skewed or improperly weighted. I think it’s a simple case of remembering the events.
Starmer never entered office with much popularity to begin with. At the time as @Jakeyboy correctly stated voters patience is getting lower and there disillusionment is getting higher. It’s also a fact that voters on the average never knew what he stood for. No part due to his campaign for ‘change’ was contradictory to his mass u-turns.
Now the ‘secret strategy’ the centre types were sprouting (lol push them left while in office) aside. Electorally this didn’t change much but the perception of voters it definitely did. Once you lose people it’s really difficult to get them back.
Secondly ‘first impressions’ in office and in life (annoyingly) do matter. On the surface the Lord Alli donations wasn’t a big deal but the smugness and smarminess they presented in that ordeal was a vindication to the belief ‘they’re all the same’. To the surprise of nobody I never believed in Starmer but even that was surprising to me the flagrance of it.
They followed this up with bad policymaking (this is a result of u-turning so much, you don’t leave yourself with more options you leave yourself with none at all).
Now people mention comms. You don’t need to be a good communicator when you’re correct and they definitely weren’t. Confusing terms like ‘working people’ didn’t help because Labour didn’t have a clue the heck that meant either.
Cutting winter fuel allowance was just bad policy period. I know complaining about boomers is popular but universal policies like that I find generally inoffensive and I broadly support. (Aware there’s people that respectfully disagree) I compare it to EMA for young people cut from the Tory/Lib Dem coalition. Incidentally also a universally applied allowance that didn’t cost a lot but had a bigger social impact (I remember the impact it did to me at least). Both parties lost ground with young voters (Lib dems for a bigger reason). Now not only that Labour did it to a voter base that actively votes but is generally right wing.
Also they executed it in a stupid way where they embarrassed themselves by walking back some of it. A few of their policies ended up like this. (welfare cuts etc).
I could go on with policies but to switch to cost of living. Reeves didn’t do Starmer much favours there. People are still complaining about the taxes to this day. That talk about ‘black hole’ which vanished when convenient just another example of comms not really mattering if you’re correct and they weren’t.
Immigration, I’ve said it before. If Labour don’t meet them where they are they lose. I believe some MP’s are revolting against Mahmoods plans which aren’t good enough for these type of voters. So good luck to them there. They should somewhat know this given they went after these voters in the election. No way they’re gonna stick around if they aren’t satisfied.
To me it checks out that it’s in the dumps. Is all of it fair? Not really I consider every Tory leader post Blair worse than him. But that’s scraping the barrel.