It would be helpful if you would relate your own bad experiences and how you overcame them. Leading off with "do it better" isn't very instructive. Unfortunately there's no useful training for much of anything in our industry, much less AI.

I prefer to use LLM as a sock puppet to filter out implausible options in my problem space and to help me recall how to do boilerplate things. Like you, I think, I also tend to write multi-paragraph prompts repeating myself and calling back on every aspect to continuously hone in on the true subject I am interested in.

I don't trust LLM's enough to operate on my behalf agentically yet. And, LLM is uncreative and hallucinatory as heck whenever it strays into novel territory, which makes it a dangerous tool.