I had two brand new bows go like that many years ago. They weren't bows of my making, but two different TD systems that were improperly done. I have broken more than a couple of one piece bows too.
When done correctly, the takedown sleeve becomes the strongest part of the bow. Eliminating riser flex is key.
This looks like someone added the takedown as an after thought. There is no glass I beam in the riser to keep the riser from flexing.
Phenolic is a poor substitute for glass when trying to reduce flex, but even it would have helped.
I have never limited the draw weight on my two piece bows and never had an issue. I do have my limits however and they are above 90 lbs.
I expect that this bow done in the mid 50 lb range on down would have never had an issue.
Sorry for your loss,
BigJim