Biden issued sweeping pardons to expected targets of Trump's anticipated (and fairly explicitly signalled) partisan weaponization of DoJ, which is an effective and costly political punishment even if it never secured a conviction, but so long as a suitable pretext can be found.

As we now see that being executed after mass partisan purges and, in several cases (sone where this is already adjudicated, more where it is pending) illegal appointments because that was the only way yo get or keep willing hacks in position to carry out the prosecutions, its arguable the only thing Biden did wrong in that regard was not doing it widely enough.