I guarantee its not all about food. "Experienced keepers" may have their ideas, but NO snake in the wild, no matter what the species is lucky enough to eat weekly or biweekly. It just doesn't happen.
You have a SD or at the very least a dwarf retic. The biology behind that animal comes with seasonal food intake based on the migratory habits of the animals around it.
Sure you can feed a snake into inactivity, but I 100% disagree with that approach, and so will people that actually study these animals.
You are doing the right thing by exploring other avenues! Retics are not some special species that are so different from every other snake species that you have to go back to the drawing board to figure out care requirements for them.
Maybe recheck the sex of your snake and make double certain you don't have a male vs male combat situation going on.
I can honestly say, I don't have any issues with my retic over any other snake in the house. Carpet, Royal or Boa Constrictor. They all have very similar care requirements.
You WILL succeed, I know you will.
She is big and beautiful, but still a cold blooded reptile with millions of years of programed instincts that don't fully change in captivity,
I honestly hate to see her suffer with pushing while you try to figure things out.
Sending positive vibes your way brother!