I've realized at such times (so yes, eligible for brownie points ) that frustration is highly associated. Depressed thoughts such as not being able to do anything right for example, then some small "supporting evidence" thing happens and...

So in that way I can see it being a depression thing, but will also say that in severe depression this doesn't happen because I don't have the energy. The same sort of "evidence" would bring on a passive reaction. Like despair and defeat.

I find it requires both depression and some degree of energy to ignite. The energy part can be tricky, because I can feel depressed and wrung out, and seem low energy, but it turns out there is, for example, resentment lurking under the surface (conscious or unconscious), that then might explode.

That is slightly different (to my thinking) from straight-up mixed (would have to think about why, but need to get ready for appt.). What your describing could be dysphoric hypo/mania. Good question.