It's a problem with pretty much anyone. Things are bad from a fundamental structural failings for decades, elect new person, don't see immediate turn-around, they're massively unpopular.
The only way out of this is if you successfully blame $marginalised_group for the peoples problems. Or spend decades undoing the damage, but nobody ever gets decades in power.
Some of it is deliberately attempting to appeal to Reform voters, in ways which have infuriated Labour supporters while not winning any Reform support.
It's because he was elected with a historically low % of the vote. Few wanted him at the election, few want him now.