I think Helen demands a lot from her relationships because she wants to always be center of attention. I think thats why when she's been working home alone, she is incredibly overbearing when whoever is her current BF gets home, because she hasn't had anyone around to pander to her
I think she forgets that when people have been at work all day they might be 1) physically drained 2) emotionally drained 3) mentally drained or even all three. Some people after long day at work, just want to come home and chill. I always thought this was a big factor in her relationship with Matthew breaking down. He seemed like he worked really hard at his job and when he came home, he would immediately have Helen not only shoving herself, but also a camera in his face.
I actually think if Helen had a busy 9-5 job working around other people, she'd be a lot more chilled out