Not necessarily. It took AGES last time for Trump to assemble his Cabinet because the democrats played games to stop him from governing. If there is a mistake to avoid, it's in trusting them to accept losing the election and allowing a new administration to govern.

They won't make that mistake again, so hence the recess appointments.

AGES? Really? Donald Trump had his last cabinet official confirmed on April 28, 2017 (Acosta at Labor). Coincidentally, that's the exact same day that Barack Obama had his final cabinet official confirmed - April 28, 2009 (Sibellius at HHS).

It's also worth remembering that the Democrats in question here didn't lose their elections. There's 47 Democratic Senators that won their last election, just like Donald Trump won his. So they also are fully entitled to the powers of their office, which include having a role in the Senate's confirmation hearings.

Accepting that Donald Trump won the election does not require anyone to stand down from using their office to try to affect how he governs. Again, the federal government is deliberately and intentionally not like a business, where the CEO is the only one in charge. Trump is entitled to make his nominations....and the Senate is entitled to Advise and Consent, which may involve making those nominees provide information or sit for hearings, and even (perhaps) not get confirmed at all.