You need to use supports! Those areas look as if they were unsupported, which means they would not lift off the bed until the print reached the arm-pit area, which is why they look flat. Since they didn't peel off the bed, every slice of the spear printed on top of itself.

My suggestion: use Chitubox, and watch this guys excellent videos on how to do supports:https://www.youtube.com/watch?v=rR-0tbBbyXk&t=657s