I've used the following support settings in Cura
Placement: Touching Buildplate
Overhang Angle: 85%
! The STL File contains the left side of the Wall Mount. Please Mirror the left side of the mount to get the right side!
Works with PLA for me
Timeshift:
https://youtu.be/IEi_cgumlgo
Printer Brand:
Creality
Printer:
Ender 3
Rafts:
No
Supports:
Yes
Resolution:
0.2
Infill:
20%