I think Trump was bumbling and arrogant, but his mistakes ultimately didn't cost us anywhere close to what Biden is costing us with his brand of bumbling governance.
People mistook Trump's arrogant bumbling as an aberration.
The thing is, ALL Presidents are arrogant bumblers by nature... people think that their governors are the best of us, when they aren't.
The illusion of wisdom in leadership is simply an illusion, like the official marble portraits of Roman emperors being distinctly different than their familial/casual portraits.
"The adults are back in charge"? Well, these adults under Biden are incompetent, and if they think they are better adults than the previous set, then they're even more arrogant than Trump ever was.
Biden is not only worse than Trump ever was... Biden also thinks he's better than Trump was. It's a combination of incompetence, stupidity, and arrogance that exceeds those "qualities" in the Trump regime.
I ultimately think that Trump's arrogance is normal for anyone who seeks out high office. (You need to be deranged to become a President, a CEO, a Senator, a Speaker of the House.) I see Trump as a normal American leader, and Biden as a below-average/mentally deficient normal American.