>>5086448She doesn't bitch about her job more than any typical person does. In fact, she often talks about how nice her coworkers are and how lenient her boss is, people just take one small worry that gets put out and blow it out of proportion.
Plus, I don't think it's dissatisfaction about her job, and more her being disappointed in missing out of so many Niji interactions due to her having to keep a work/sleep schedule. There have been many many times that Elira and Finana (who are NEETs) have shown up and talked with other Nijis in their streams, or hopped on a Minecraft server when other Nijis are playing, but Pomu is not able to since she is either asleep or at work.