Don't put too much into the parked image of VooDoo, the right elevator is not in alignment with the left, this does not mean what you see is what presented at the moment of failure. It would be interesting to read the record of VooDoo.
I don't see the Trim Tab as failing first, it is stressed by position, not load. It is comfortable in the configuration at failure, whilst the Elevators are not.
IOW, the tab is not experiencing any untoward loading. For it to fail, it needs a critical stress point to be exceeded. The failure of the right ELEVATOR explains this critical load nicely. I think Clipped Cub is on to this?