'Biden has undelivered to the electorate'
By what metric?
Immigration? According to the CATO institute "In the two years before Mr. Biden took office, the Trump administration released nearly 713,000 immigrants, or a little over 52 percent of the 1.4 million crossers. In other words, Mr. Trump’s policies resulted in far fewer removals in absolute terms and a slightly higher percentage of released border crossers than Mr. Biden’s."
https://www.cato.org/commentary/biden-cant-stop-immigration-time-embrace-it
Suggest you read beyond whatever Trumpian propaganda you're filling your head with. Immigration is a hugely complex humanitarian problem and it's not just the US that's struggling with it.
What about the economy?
https://apnews.com/article/trump-economy-biden-election-president-e3a153c9b0c615ea6e0f2afb91cdc785
"But the economic numbers expose a far more complicated reality during Trump’s time in the White House. His tax cuts never delivered the promised growth. His budget deficits surged and then stayed relatively high under Biden. His tariffs and trade deals never brought back all of the lost factory jobs."
Every incumbent from across the political spectrum in elections across the world this year is facing challenges around standard of living falls caused by the inflation triggered by the opening up of economies after lockdown.
Healthcare?
Trump "supported failed Congressional proposals to repeal and replace the ACA with weakened protections for preexisting conditions, reduced premium assistance, elimination of the Medicaid expansion, and a cap on all federal funding for Medicaid. "
Biden "proposes to build on the ACA by increasing premium assistance and creating a Medicare-like public option plan, which would be available to anyone and automatically cover people with low incomes in states that have not expanded Medicaid. He would also lower the age of eligibility for Medicare to 60 years, and supports increased federal funding to states for Medicaid during the economic crisis."
https://jamanetwork.com/journals/jama-health-forum/fullarticle/2770427