I agree, plenty can be done to combat the media. We need Alastair Campbell doing what he did best. All these attacks on JC, Dianne Abbot - when did Labour ever take anyone to court? Sue anyone? They became soft targets. It's only in the last 2 weeks of the election did I see labour ads online and labour activists online protecting the party or talking about it's policies. What is the momentum troll farm doing?
Comments sections influence opinion, they could build a software looking for labour stories or comments on websites, which would then "like" pro-labour posts, clear it's cookies, go back, do it again. Ensure the top comments are regularly pro-labour ones. It's not hard to do.
There are pro-labour papers, pro labour journalists, why weren't they "encouraged".
The anti semetisim thing was a shitshow. Everyone knew from day 1 that they had to bend over backwards to prove it wasn't institutional, because it was more about slurring labour and less about real anti semetism. Instead they went on the defensive!
Most importantly though - the policies just weren't there. The country is xenophobic, you have to pander to them, just until you get into power.