What matters of fact do you have a problem with? That there weren't nearly 12,000 documents?
There are people who know and loathe Trump well who offerwhat I think is a more believable explanation. It's about Trump's resentment at losing and being dislodged from the White House. This was his way of asserting that he's still the legitimate President and his way of trolling his successor. Keep in mind that he's basically a seething ball of resentment.