Checkout my new STRONG one: https://www.thingiverse.com/thing:5846592

Changed many things:
First to an under-table hanger with holes for an 3mm screw
Second thicker walls, original version breake
new connection from mount to holder

you can print with 60° support angle only on the top for the controller holder.
The long part need no support

Creality

Ender 3

Yes