I think it's important to remember that Biden was, perhaps more than any president in my lifetime (and I'm an old man), an institutionalist. He was a senator for just about forever, then the VP for 8 years. He was 78 years old when he became president. He is an old school liberal Catholic, a very nearly extinct person in the Catholic and Christian spheres.
I think he saw his presidency as a repudiation of right wing reactionary politics. His election, in his mind, was in large part a call to what he saw as the original intent and purpose of the executive branch. To put it plainly, he saw himself as elected because America rejected the politicization of government under Trump. Included under that umbrella of beliefs about the purpose of the executive was the unalienable requirement that the executive not direct the FBI to investigate the opposing political party. Remember, Joe Biden was a senator when Nixon resigned. He was there when Nixon was using the executive branch to attack Democrats.
Biden appointed Garland to the DOJ. Garland's record was perfectly fine and appeared well suited to the role, but his biggest strengths (in Biden's mind) was his nonpartisanship and his conservative view of government. By conservative I mean staying within the lines of what the DOJ should be doing, a cautious view of the use of DOJ power. Again, this was done in reaction to Trump and his... let's call it "expansive" view of government power. In Biden's mind, he was righting the ship.
And Garland was exactly as advertised, to a maddening degree. He was cautious to the point of being timid. He refused to throw the weight of the DOJ into investigations with political implications without reaching an imaginary bar of fairness that just isn't realistic. You saw it in the Jan 6th investigations. You saw it in the Kushner deals (and all of the Trump family deals which are obviously dirty). You saw it in Garland's unwillingness to take on wildly politicized federal prosecutor offices because doing so would be political interference (in his mind). You saw it when Robert Hur took unprofessionalism and partisanship to the absolute extreme when attacking Biden under the guise of a special counsel appointment and Garland did nothing because instiutionalism in his mind meant not interfering with the process.
And you saw it in the Epstein case.
Garland did everything by the book to an absurd degree that ended up paralyzing justice. Biden didn't touch Garland or any of it because he believes doing so was itself an injustice, even if Garland was wrong to handle it the way he did. In Biden's mind, the president should not have the power to demand the DOJ take action in a specific case like the Epstein case, especially if there's political implications.
