Irregular 3D printed part
Your print isn't cooling fast enough. With small, thin prints like this, PLA needs a fair bit of airflow to solidify before the next layer goes down. Your printer doesn't appear to have a proper print-cooling fan, so I have two suggestions:


Print two or even three of the part at the same time, spaced a fair distance apart on the build plate. This will give each of them time to cool.
Point a box fan into the front of the printer to get good airflow over the print.