Corbyn got invited to a Jewdas passover party - it's in literally no dispute that he was against anti-semitism. Labour's systematic problems were under investigation at the time and it was fair of him to not say anything until that investigation completed, however that itself was turned by the press into being viewed as an avoidant strategy, rather than an act of prudence. And as far as anti-semitism goes, the Tories have a much longer and much deeper history of islamaphobia. But at no point did it recieve the same 24/7 press attention, even though many of the incidents were happening concurrently. It was generally only ever mentioned as a sidenote to the Labour anti-semitism scandal. Hell, for a practical sample, just look at this article by the bbc[1], chosen at random (keywords: tory party islamaphobia general election), it is about Tory islamaphobia but the majority of the content present, per paragraph, is devoted to the anti-semitism accusations against Labour.
Even at the end of the year, the Tory party had failed to address it in any meaningful sense[2]
In no way did he get an easy ride. Every single tabloid and media outlet was, on the whole, against him from the start. There was a London School of Economics study a number of years back, showing definively that press coverage of Corbyn was nowhere near balanced[3]. That's not even to take into account that during the election debate, the BBC edited out laughs, by the audience, directed at Johnson's comments[4]. The bbc committed a number of "editorial mistakes" that represented themselves as Tory bias.
[1]: https://www.bbc.co.uk/news/election-2019-50561043
[2]: https://www.independent.co.uk/voices/islamophobia-conservati...
[3]: https://www.lse.ac.uk/media-and-communications/research/rese...
[4]: https://www.theguardian.com/media/2019/nov/25/bbc-admits-mis...