Deformations often occur at the tip or thin ends. The main reason for this problem is a too high temperature for the chosen filament. Parts of the object look like over extruded. The whole print looks melted. If the temperature is too high, the plastic can cake on the inner wall of the nozzle and block it. A good balance between enough temperature, speed and cooling is needed to get the plastic in the right shape.
If you are printing with a very low speed, the plastic remains for a longer time in the nozzle and degrades. The melt flow rises and too much plastic comes out of the printer nozzle. Try to set the speed up or the temperature down.