I'm curious what you think were the most extreme demonstrations of competence during the biden admin.

Not the op, but I think the IRA and to a lesser degree the IIJA were important bills that tackled big, important problems -- climate change, protecting security critical domestic manufacturing, building domestic energy production capacity. I am also impressed that Biden managed a soft landing from covid-era inflation. I expected a recession

We as a society have systems and checks for the democracy to work

The debate performance says otherwise

Trump and Biden are BOTH way WAY too old and senile to be president. I really don't understand how Trump supporters can complain that Biden is senile when Trump doesn't remember major things he did during his first term. 60 should be the max age to run for President considering how important and stressful it is.

I think it’s fair to compare the “administrations”, not necessarily the individual. Biden’s administration is relatively far more competent than the Trump administration, in large part because Trump doesn’t care what the rest of his administration thinks, so long as it benefits him personally. Biden, with all his flaws, was not egotistical.

Trump's debate performance against Kamala was awful too ("concepts of a plan", etc), but he will forever get judged with a different set of criteria by his fans.

Whataboutism is pervasive and pernicious

Biden is smart and senile. Trump is stupid and senile and that is worse.