Maybe you did better on SAD diet because you ate more variety, enough calories, or got used to eating lots of carbs.
I've seen sometimes that people who change their diets to raw animal foods (and other raw foods) sometimes don't eat much variety, eating only 1 type of meat and only a specific cut at that, as 95+% (in terms of volume, not calories) of their food intake.
Another thing is that raw animal foods are much lower in carbohydrates than SAD diets because SAD include a lot of refined carbohydrates like pasta, bread, rice, etc. - that stuff is instant energy. For instance, look at Michael Phelps, olympic medalist gold swimmer, leading up to the olympics, during his training, it is reported that he was eating upto 12,000 calories a day. His diet was full of crap . But, since he was burning most of it off, it didn't really matter. In fact he may have needed those extra refined carbohydrates to use as fuel.
In conclusion, variety is very important. Also, compare whether you were eating lots of carbohydrates on SAD diet and how many carbohydrates you eat now. Personally, for carbohydrates, well, theres many options though not too many are raw. Fruits are a good choice, but I prefer higher carb vegetables like carrots, vegetable juices, raw sweet potato. sometimes I eat cooked rice, cooked sweet potato, or a slice of bread for some extra energy from these refined goods.
In terms of fish, well I would freeze the fish first. That's what I do. I think raw coconuts are much better than coconut oil, as coconut oil most likely isn't raw. You can even make your own fresh coconut oil, but I find it quite tedious so I don't do that.
I think you should do what works in terms of marinade. I think apple cider vinegar isn't a good choice because since it is vinegar it might degrade your teeth over time. Even though I like eating the meats plain with other side dishes, I'd rather use a low sodium, no preservatives hot sauce than apple cider vinegar. Other than the teeth issue, I don't have a problem with apple cider vinegar though.
Good luck, remember, try to get variety and assess whether you are eating carbohydrates.