labour have been in power in the UK,2 months,and already the press are on their back day and night, why?

Because the press in the uk is overwhelmingly right-wing, with popular papers like the Daily Mail bordering on far right.

They can see that what Labour are doing will pay dividends by the end of the parliament, and they are terrified.

Because the press and media are Tory owned

The long and the short of it is the fact that the UK has seen just about every form of conservatism over the 14 years they were in office.

And the only thing you can draw from it is that those who own newspapers; tv news outlets and several online sites means every reincarnation, whether it be Cameron and Osborne's 'Austerity' or Johnson's response to covid or Truss's high risk gamble with the economy that essentially bankrupted the current and next generation in order to back employers and businesses who haven't paid living wages sufficient for employees to pay their pensions to the point of retirement for a decade or more, meaning that most will either have to die working beyond the age of 70, or apply for scaled down benefits....will be supported by media owners UNTIL there are laws created that means THEY will have NO choice but to pay THEIR share.
Which they've skillfully avoided doing up to this current generation that don't watch or listen or read news anyway

Well the press is not supposed to be there to promote any government or single political agenda. And as soon as we start prescribing what journalists should or should not be saying, the whole notion of a free press is compromised.

That said, what passes for the "mainstream media" in the UK is overwhelmingly slanted towards a conservative viewpoint. And it is all very well the BBC reporting on public opinion as reflected in other media outlets and observing weaknesses in Labour's communications strategy, but how about trying some serious economic analysis of the means testing of the winter fuel allowance by way of providing a bit of balance? In my view this is an essential first step in inter-generational equity and distributing scarce public resources more fairly. Its generally negative reception does not bode well for the success of Labour's wider publuc spending policy.

It’s because they are rushing in policies that were not well thought out. Take the winter fuel allowance. Truth is that far more need it than they will be giving it to. The line was not drawn on the right place. But to align it any other way would cost too much.
It also does not look good when you are receiving donations for clothes when you are about to raise taxes. It shows they can’t live like they will be expecting us to after the budget.
The expected tax rises will also potentially dent the economy badly.
I hope it’s different as we need a reset. But it won’t look pretty.

Cui Bono

Follow the money trail there are many different press outlets. Many of them are not actually journalists.