The thing that made her interesting/popular is what lead to her downfall imo. The weirdness. It was really exciting when she first debuted.
The new weirdo girl in the meat dress with the catchy songs on the radio! wow! then it got to the
"oh, she's being weird again " phase and before you knew it, everyone was just over it. She kept trying to outweird herself and you could just tell it was forced. But instead of shock factor, it alienated already bored audiences even more. Such an image/gimmick is not one that can last long term.
Now, she's trying to turn it all around... but it's too late. It's like she's a brand new artist on the come up again. If she had a strong lead single, I think things would have panned out differently tho.