Bulk Automated Content Generation Sucks))

even automation takes some manually work here and there, but generally you can work with fully automated AI content. you can let the AI generate everything related to your keyword such as titles which to build articles from. it will be related to your topic and not unrelated crap for example. you can tell it to include specific keywords and similar keywords etc ..there are always multiple ways to do things.
just because you tried once and didnt get the expected results, doesnt mean you have to give up. try other things, refine your prompts and you will get better results over time.