Go back to 2010, the Tea Party Patriots and Mitch McConnell deliberately obstructing everything Obama tried to do...even after the Dems actually made numerous attempts to compromise.
If Trump loses in November, he will spend every single day of those subsequent four years trying to destroy Biden, not any different from the birther controversy. Fox News, Breitbart, Alex Jones, Rush, OAN, etc. will do the exact same. Why would anyone expect that dichotomy to change, the divisiveness to be healed?
It only seems MORE unfair is because this last month has been the bottom of the Trump presidency in terms of support and polling. Obama reached similar numbers in the upper 30’s, but actually had the ability to reach out to more than just his base. In fact, you can say the same of every President re-elected in modern times, even GW Bush and Nixon.