There was a lot of negativity around Corbyn in the newspapers that tend to flip-flop - only the definite left-leaning papers (The Guardian, etc) maintain their support for Labour and the LibDems.

My observation of the BBC's coverage was that while they at least didn't put a positive spin on the Tories, it felt like they were doubling-down on anti-Labour and anti-LibDem negativity. I still don't believe the BBC is in any way biased towards any particular political party, but I feel there's a feedback-loop somewhere in the media system. Once the meme "Corbyn is unelectable" becomes a meme and people don't stop to question it - or it becomes self-referential ("Corbyn is unelectable because the people believe he's unelectable") then we have a problem.

(Disclaimer: I would not actually vote for Corbyn myself - just saying).

No, most of the UK media supports the party that won.