I don't know. I've always voted Labour (apart from in the MEP elections when I voted Lib Dem as a tactical vote (for what good it did where I live). I used to be a member of the LP, but let it slide a while ago, for reasons entirely unrelated to Corbyn. Friends of mine who are active in the LP, however, aren't enamoured of him at all, and say that there is bullying and anti-semitism. Anti-semitism not from Corbyn , but from others who haven't been checked by him, and bullying against anyone who doesn't agree with Corbyn.
Nevertheless, I would rather have him as PM than Johnson any day of the week. I think his policies are sound, and even if he is single minded about pushing them forward, he is totally eclipsed in the bullying stakes by Johnson, surely?
I am not surprised by the results of the research, though. The bias of the UK press is appalling, and pretty much always has been, I think. Does anyone remember the work of the Glasgow Media Group back in the day? There is nothing like that now (that I know of, anyway), which I think is a shame, as they were very good at rooting out systemic bias. They would certainly have flushed out the matey 'Boris/Bojo' way in which the PM is described, for instance, as opposed to everyone else, who gets Mr/Mrs or Surname.
I read something yesterday (Jonathan Freidland in the Guardian, I think - my phone is struggling to get a signal, so I'll try to find the link tomorrow if anyone wants it) which said that it is only people who are particularly interested in news and politics who are affected by most of the published stories, and they have usually made up their minds anyway.
Most people watch the TV News, and aren't glued to the BBC Parliament channel, or obsessively watching Twitter and following opinion leaders, so they see summaries that are mediated by programme makers.
The example he gave was Johnson's speech to the Police Cadets on Friday. I was watching it live on the BBC News Channel, and it was dreadful. Absolutely awful. He appeared to have left his speech behind, forgot the police caution that a (feeble) joke relied on, and was embarrassing even to me, and I can't bear the man. The BBC News, however, showed him standing in front of a group of police, and reported that he had said he was going to deliver Brexit on 31st October - the same soundbite as usual. It gave a very different impression, and is likely to have a positive, rather than negative impact on Johnson. His brother's resignation, on the other hand, is much more damaging, as it is a single topic, unambiguous, and most people can identify with sibling disagreements.
Is it surprising, therefore, that messages get lost? Not everyone has time (or inclination) to watch hours of live coverage, or research every report they read, so mostly we do rely on summaries.
I don't know what we can do about the bias, though, unfortunately. Insisting on anything to do with the press is potentially dodgy, and anyway, a lot of it is subjective.