I agree. The triangular Priority Mail boxes you get at the post office are much sturdier.
The newest triangular Priority Mail tubes are crap.
This box isn't much better, but it wasn't packaged well at all.
The box would of been adequate if the packing was better.
Poor shipping skills by Seyberts.
Marking or labeling "fragile" doesn't help and may make things worse.
The key is better packing & packaging.
Double wall boxes are too expensive, nobody uses them for cues & cases.
The key is in the packaging, my 8x8x36 tall boxes for cases aren't much better, but I don't have this problem.