Bee pollen has a lot of protein in it. Not really something you want to feed a lot of or any to a bird that is already having egg laying issues. It is more of a supplement you would add to food as a booster and not an actual source of food.
Your not going to find a pellet that only has the ingredients you want in them. Roudybush, Harrison's and Zupreem are not bad products. What your failing to consider when rejecting them as food for your bird is that they are "formulated" with balance in mind (crude protein, fat, vitamins, etc). The proper balance and ratios of food and the nutrients in food is what's truly important when considering diet. Too much or not enough of any one thing is not only NOT good but it also affects the other things they eat because all these things (vitamins, minerals, protein, fat etc) rely on the other things in the proper proportion in order to work and be utilized.
Changing/improving/altering your birds diet is good and certainly couldn't hurt but it is not the root of your hens problem. She has become a chronic layer whether it's in her lineage or it was developed and diet is only one part of the problem that needs to be addressed.