I have no advice except it’s your money - spend it how you want.
As for the food, we adopted a puppy in February & I was stunned after researching pet food about the horrible ingredients. I feed our girl a higher priced dry brand but those who can afford a good quality raw diet report health improvement similar to what you are saying.
It’s no different with humans. I’m pretty choosey about what I feed my kids for the same reason. All the frankenfoods out there are not worth the convenience.
I worked for a major pet food manufacturer. Raw materials used in pet food from China were not allowed to be inspected. Quality control in US had no idea what was in the food. It was recommended to never buy food, especially snacks (bacon strips) because many deaths. I only feed my pets organic due to this. Holistic may work. You can google China pet food and dog deaths for more info.