On Ryzen, the USB 2.0 ports are from the USB 3.1 controller, so you gotta put the universal USB driver on the laptop's drive, then point the installer to that driver, install the driver, and then you should be able to install Vista.
Also you will have no video drivers, just stick with 7.
Thanks for helping, i think i fully agree with your advice. Meanwhile I've found something more interesting. A client gave me an old low-end circa-2005-06 sempron machine. Vista booted without issues. I think it doesn't make any sense for me to go higher in performance than this, so i've left my laptop with a BSD distro (for performance-demanding tasks) and i'm using the old machine as a daily driver. So far most things seem to work and i'm amazed how more robust Vista is and lighter compared to 7, it's likely my favorite system at this point. I've installed some of the newer security updates after installling and configuring the ISO you've shared and the Extended Kernel, but i can't seem to make CPU-Z and HWinfo (i know) work in their latest versions. There are other stuff to try and i've never even scratched the surface.