Yeah, they gave her good coverage, and they covered Trump way too much. It was all comical to them, and they were were going after Trump just like most of the other media outlets. The problem with that strategy is that Trump is rather good at dealing with accusations of wrongdoing and tends to come out better than he went in. It was really after the election that they properly ramped-up in to conspiracy theories and shameless activism. Clinton herself cited press coverage as one of the reasons she lost.

It's a very different election this time round. In 2016 it was a comical outsider who didn't stand a chance against heir to the throne Clinton. Part of it certainly is that Biden is not marketable, and arguably unfit for office, but that leads in to the main issue. The big problem is in how this election is essentially <insert candidate> versus Trump, so reporting is likely to continue going negative on Trump to the detriment of coverage that could give Biden more of a chance if he were aware of where he is at any given time. Biden is an amazingly terrible candidate, and you're right about it probably being best to avoid having him on too much. The media is probably going to focus on negative attacks on Trump and hope that people don't notice Biden in the background cheerfully urinating in a potted plant.