Hi Rockykite,
If you talk to kiters with many years of experience you'll notice that equipment failure is just ''part of the sport'' and it's not definitely not brand specific. I've had other line and depower / safety line breaks in the past with a few other other big brands. Each time such an incident happened, a closer inspection revealed that I should've replaced those parts in the first place as they were showing signs of advanced wear and tear.
Looking at the general state of your bar it just looks like it's had some heavy use and was in need of some TLC.
No Kite manufacturer is perfect, but they all learn and evolve from such experiences. Core has now added a protective sleeve to the depower line where it connects to the ''Y'' to help reduce line abrasion.
The picture below is probably the same as what you have. As you can see on the upper part of the image there is some considerable rope fraying/abrasion where is actually tensions and slides around the metal ring. This bar is no longer in use and will need a new depower rope. Yours probably looked like this or even worse before the incident.
If you order a new Core depower rope, it will look like this:
As you can see this depower rope will inevitably get a longer life. The only issue with any kite brands covering such parts is that you can't actually see if there is any wear and tear underneath the protective cover.
So yes it's worth replacing it. Check your lines as well perhaps they need replacement as well.
Kiters are quick to blame brands for equipment failure where most of the time it could've been prevented with regular inspections and regular maintenance.
Check your equipment regularly and rinse your bar and lines.
Christian