Earlier quoted context omitted.
The web UI makes that easier with GCP, but the main "UI" for me is Terraform, with only occasional usage of the "human-rated" interfaces. BTW, I hate Terraform with a passion, but I don't have the energy to write something that can describe infrastructure in Lisp.
Why do you find GCP 3rd then? They have Terraform templates for all (?) their services includes in the docs.
In any case, all three big ones are pretty good for almost anything, and I don't think there is anything that's doable on one that's impossible to do in the others (IBM is the exception here - if you need AIX, IBMi or Z, they are the only ones who can offer that).