The ancient large black holes doesn’t fit theories of how the cosmic beasts grow so massive.

WHY? because the big bang was different from the mainstream BH.

What is wrong with physics?
According to my Q-FFF Theory, It was the explosion of the compact string knot big Crunch Black Holes of a former multi-universe into smaller chunks of baby black holes. forming dual BH Herbig Haro systems with star formation in between both bow shock black holes.
 see: https://www.researchgate.net/publication/348629597_What_is_Wrong_with_Current_Physics

https://www.sciencenews.org/article/most-ancient-supermassive-black-hole-quasar-bafflingly-big?fbclid=IwAR30mtH5XqgNVhNzcrh9ttvOIG9IaAWtKUHAQ4oungs3rwh3GtF8AO85y5g