Not here in America they were.
In fact, they were drilling the Biden age issue so hard that that I was saying they were deliberately hyping it in order to help Trump win. But even if it seemed that way just to me, fact is when somebody like George Clooney said that he wasn't fit, they waved that around like it was a neon-colored flag announcement of impending doom for months.
What you call a "leftist controlled media" is owned by big business Republicans. Remember, CNN couldn't stop talking about Trump starting in 2015. If there was a way of searching, you could find comments of mine back in 2016 saying that they should change their name to TNN, after Trump. They blew him up into the leading candidate.
I would suggest that sometimes folks got to read between the lies on these types of things but the fact is, no need to read between the lines when it's so overt. Granted, Fox adds an LOL sneer to everything, but CNN & MSNBC & Co just do it without the hot cheerleader squad jumping out up and down shaking their massive plastic boobies so everyone can get jump on that bandwagon.