Let's bring this into today's context.

Do we think Putin is a bad guy or a good guy?

Do we think Xi is a bad guy or a good guy?

Do we think Biden is a bad guy or a good guy?

Do we think Trump is a bad guy or a good guy?

All these questions suffer from the same problematic premise. Unless we have direct contact with one of these men (rare), we have no clue who they actually are or were. All we have is reporting about them. "History" is written by the winners; it's been true since the beginning of the universe. The current moment we have is equally filtered by middlemen.

We take opinions that others have about a person and adopt those as our own.

I am confident that Hitler was not "Hitler". The amount of propaganda value that "Hitler" has is beyond measure. As such, the persona attached to the man has become mythological. Take all the evil we have experienced any individual capable of, and that is now summed up as "Hitler". He was a politician and the leader of a powerful movement. That makes it likely he was a royal asshole. But any more of an asshole than all the other politicians and leaders of powerful movements? (Looking at FDR and Churchill here). Seems unlikely to me. The difference is he lost, they won.

The truth has very little to do either with history or with our current moment. It's always been so. Money talks and bullshit walks.