However it’s characterized, holding up the approval of your senior military appointments is self-defeating and effing stupid.Senate "holds" aren't limited only to appointments, and can be overridden. The process for overriding is time-consuming, but could be used to move some appointments through. Or, the Senate could vote to change the applicable rule to narrow the scope of what can be held.
Holds, like filibusters, are a vital linchpin of American democracy to the minority party, and an obstructive anti-democratic abomination to the majority party.