You absolutely can.You can't agree with the independent prosecutor and also say Garland should have been out front aggressively pursuing it. The purpose of the independent prosecutor is to screen off real or percieved political persecution by the political appointee of Trump's political rival. Garland out front isn't as bad as Biden out front, but it is still not what I would want to see.
The system was all doing its job. They ran out of time and the public committed a major unforced error. There were two separate errors with the name Biden on them. One was Joe (really his staff I am sure) losing track of confidential documents in his possession when he was VP. The other was Hunter Biden lying on a gun application. Those errors made it a lot more difficult to articulate an argument that Trump was flagrantly irresponsible with confidential material and that he headed a family of criminal fraudsters. There wasn't equivalency, but we needed a qualitative difference, not quantitative.
As AG, he should have made the appointment a day 1 task. Not waiting until November. Before appointing, if he wanted to wait, he could have initiated an investigation and put resources and personnel into it. But they chose to wait and hope Trump went away on his own. That was a mistake.
Yes, a lot of this time comes down to Judge Cannon, who should have never been allowed to have the case. An invested AG could have worked to do something about that instead of just letting things "play out".
There are other ways the AGs office can support an investigation while remaining hands off.
As far as Hunter and Joe losing documents, those are nothingburgers. Excuses designed to pull attention from the criminal acts of Trump.