I used pulumi but it’s much worse than terraform. I didn’t used to think so before I learned terraform however.
My main reason to dislike pulumi is that you have to work around it’s async behavior in python. Maybe it’s better and more natural if you use typescript, but I had to constantly wrap methods in Outputs and other things to get the code to work.
I had to adapt my code to how pulumi worked all the time. With terraform, I just write it and it works.