There was no small amount of obstruction from the Republican party and SCOTUS. It was a while before Garland was appointed AG. Judge Cannon raised some weird challenges to the investigations and indictments against Trump, including his unlawful possession of classified documents.

And then SCOTUS gave Trump immunity for everything he did in office, essentially requiring any challenges to that immunity be taken up with the captured Supreme Court itself.

There were a tuckfun of shenanigans played to delay until Biden’s term was over. And then the voters had the audacity to elect Trump for a second term, with full awareness of what kind of monster he was.

Essentially, the voters of the US decided to let him get away with it, and take over the federal government to rob the treasury.

To quote Jamille Bouie, To think that the American people did that [elected Trump as President], to think that is the reality of the situation, raises difficult questions about this country, difficult questions about our capacity for self government.