Over blocked or missed my gauge, who knows but this was too much. It was frogged for it's sin.
I discovered that my most spectacular knitting fails have no picture evidence... The one that bums me out, I could have sworn I took a picture, a failed unicorn horn. I knit a unicorn horn to attach to a hoodie and wanted to have the spiral up the horn. I knit the horn, threaded yarn around through the stitches, and pulled it to create the 3D effect. The tip of the horn looked very NSFW.
Definitely seems like a gauge issue. It should essentially be a tube that stretches a bit to fit on your head for it to slouch like that, if it’s any wider it will mushroom like you said.