If anyone should be pissed, it's the military. These people sign up to give their life for the country, and their votes are used to manufacture a Biden win?
That's not right...
(Referring to the fact that many counties experienced extreme voter irregularities with military ballots. 90%+ coming in for Biden. Which is very unlikely seeing as Trump protects the military and funds them very well.)
A lot of the people I know in service (or formerly in service) have a rather jaded view: fucking around with military ballots isn't new, and they kind of expect it. They also expect politicians to play politics with/on them, so they're kinda jaded about that too. Also, the oath isn't to any particular political party, and many really are very apolitical.
Personal experience: Uncle Sam owns your ass; you really don't have a say in the matter. That being said, indifference is perhaps far better than partisanship in this instance.