Not sure why you think Trump is better for USA’s bottom line or that there is bias in the media coverage recently.
Big businesses are happier with flawed stable democracies they can influence with their infinite money than playing by China or Russia-like rules that a Trump presidency may bring.
Biden is not a grassroots politician, if his donors aren’t happy, we will find out, and I think this is what’s happening right now, hence, the change in tune by the media. It’s odd alarm bells haven’t been ringing for much longer, yes, but we are a logical bunch and the world is mad (and stupid).