It's the line from "The Marvelous Maisel" Season 2 episode 2. It's a drama happened in 1958.
Here are the character's lines who's on a comedic gig:
I don't want my own apartment.
I-I don't feel ready, mentally, to have my own keys, my own plumbing, my own angry Ukrainian super.
I don't feel prepared to take on that kind of responsibility alone.
So what's the meaning of "angry Ukrainian super" here?