Lol the Obama administration did not 'do nothing.'

They offered a plea agreement to the Hammonds (cause d'etre of the whole thing), who were then sentenced for a wildland fire under dubious circumstances.

After the sentencing it was a done deal, it was over. Then Obama's DOJ had to stoke the flames and reneg on it.

It shouldn't have been a surprise what unfolded after the government reneging, in a way that was so egregious that they (the people that were the cause d'etre for the Malheur occupation) were pardoned with the following remarks during the pardon:

"The evidence at trial regarding the Hammonds’ responsibility for the fire was conflicting, and the jury acquitted them on most (sic) of the charges." According to his spokesperson Sarah Sanders, who read the statement, "The previous administration, however, filed an overzealous appeal that resulted in the Hammonds being sentenced to five years in prison"

So you can see the Malheur occupation was a response to a federal government who engaged in such tyrannical behavior as inducing a plea bargain that gave up right to appeal, then themselves hypocritically appealing the sentence and changing it after the fact. The Malheur occupation was a response to this, if Obama had 'done nothing' in the case of the Hammonds or just respected the judge's sentence none of it would have happened. In my estimation Bundy et al was the only thing that brought the Hammonds the visibility to get the justice of a pardon under these circumstances.