Sliding Door Security Bar Clasp

The clasp broke on my sliding glass door's security bar - it could lay in place like it should, but there was nothing preventing someone/something from listing the bar. I started by emulating the broken piece in Tinkercad, but extruded PLA is stiffer and more fragile than injection-molded ABS, so I made adjustments to make it easier to use and to keep it from breaking.

When I printed it vertically; the arms snapped off (between layers). I printed it horizontally; the base snapped (also betw