Hugo is absolutely fantastic and incredibly powerful. It's nowhere near as simple as was requested. It's the most setup of any of the SSGs worth using.
The biggest issue with Hugo for me was trying to create a custom theme (in order to get a stripped-down site without a bunch of BS), everything breaks if you don't arrange all the files exactly the way required by Hugo themes.
Once I got that, and learned some Go templating in the process, it's just markdown files, fire and forget.
Agreed. I have been using hugo for my blog https://erock.io and I still don't completely understand how it works. I just have enough to pattern match on to figure things out
https://gohugo.io/