Like I said, it was supposed to be inspired by about the stages of grief. So depression becomes a focus after denial(first episodes where it's like Vision never even died), anger(when she throws Monica for breaking the facade) and bargaining(when she tries to convince herself that things are still fine and she can keep up the hex).
Yes, she was already depressed before as soon as she lost him, but after she created the hex, that fake life was enough to make her happy until she got confronted with reality again. When you mix real life situations with mystical/sci-fi elements, it's never gonna be a perfect 1:1 equivalent.