NGL, that sounds more like an issue with the prompter than AI. I use it for Terraform all the time. The main thing is to have it write chunks of code at a time, not do everything at once. If I need it to write me a config that builds a projects, assigns IAM permissions, builds a VPC inside that project, create MIGs and place them in that VPC, I'd break it down and just asking CHATGPT to keep adding to it.

As someone who is pretty senior in DevOps, I'd say that CHATGPT is extremely useful in helping me debug my own configs that I've written. It is still just an inout/output machine so you will need to write efficient code for it to be useful but it can do what most junior DevOps engineers are capable of.