First off, I doubt you got played on gear like that and if you did your the only person I've ever met who has. Second, the offering is legendary gear. It's purely just to get extra gear that might have god rolls. Kinda surprised your that high in light and just now discovering the offering isn't powerful gear lmao
It happened to a clan mate this week, buddy.
I was there when we finished the 5th Crucible match and his reward was 25 light levels below what he was. He was 629 with current gear and got a 604 item, I got a 630 item.
And Bungie had this issue in Forsaken - they even admitted it in Patch notes and TWAB.