That sounds like a process problem. LLMs, like any tool, work better if you don't use them in the naive "do this" way. This works well for me:

https://news.ycombinator.com/item?id=48083267

"Insanity is doing the same thing over and over again and expecting different results."

There is certainly randomness in model output that the user has to work around, but sending the same prompt with the same context (or even worse- with added entropy leaving the previous failed prompt in the context) over and over again akin to pulling a slot machine lever is certainly user error and not the way to "hold it".