The actress was dropped by the ABC drama series in February after playing Edie Britt for five years.
Reflecting on her time with the programme, Sheridan told TV Guide: "When the show started it was such a different beast.
"It was exciting and dangerous and funny and edgy and bizarre. It started feeling a little complacent, and that was very frustrating."
Sheridan also suggested that show creator Marc Cherry ignored her character, commenting: "When you have a jewel, why not polish it and put it out there for all to see?"
She added: "I think whoever Edie represented in Marc's life was somebody he didn't like. And he had a very difficult time distinguishing between fact and fiction."
However, Cherry has dismissed accusations of a personal vendetta, insisting that there was no room for further development of Sheridan's character.
Discussing plans for her replacement, he continued: "We will find a new kind of sexiness coming through Wisteria Lane. What I won't do is cast another forty-something sexy blonde. Nicollette Sheridan performed the aging neighbourhood tramp better than anyone has ever done before."