Printed with 3 perimeter walls around the bottom of the model and 4 perimeter walls around the hooks.
5% infill for the bottom and 15% for the hooks. 

Material used is PLA+ from Eryone.

Print it laying flat on its side so that the layer lines are not perpendicular to the force being applied to it.

If even more strength is needed, I recommend flipping it 45 degrees so that the print lines are not parallel nor perpendicular to the downwards force. 

Can hold up my IOTV with plates (30lbs) with no signs of bending or warping due to the weight.

Heavily Inspired by https://www.printables.com/model/851702-bag-coat-hanger