Could you give me an example of something you had trouble looking up? I am genuinely curious.
As far as experience - the Cloud hasn't lived up to the promise for me. We often use Azure function apps and debugging them is a pain. Sometimes the function doesn't load at all when you change one thing, etc.
AWS was a bit of a better experience, and I think almost everyone knows what "S3" is. That is to say that AWS immediately springs to mind when you need to store BLOBs.
I have also read about people having a lot of problems with GCPs BigQuery - infrequent, but random downtimes with support not being able to figure out the issue.
Edit: As someone else said below - I do agree that all Google's services have a clear use, whereas AWS and Azure tend to have a lot that you just kind of ignore.