Yeah, hypomania unfortunately isn't always fun and games. Euphoria is a symptom, but it doesn't HAVE to be there. You can have mood lability or irritability in its place and still be "hypomanic" (which is actually more common and one of the reasons why episodes go misdiagnosed). If you're having some depressive features in there you could claim "mixed features" if that makes you more comfortable (it'd be treated similarly).