You have misunderstood what these reports are saying.

You claimed "Ventoy adds repos". It does not. It is incapable of doing anything of the kind. It does not run on the installed system. It does not modify the boot media in any way. This is demonstrable and verifiable.

When booted from Ventoy, openSUSE apparently adds the installation media as a repository.

This is not some disaster or horrible hack. This is normal behaviour for Debian, for example.

That means that something in the openSUSE installer is misinterpreting boot parameters.

This is a openSUSE bug, not a Ventoy bug.

SUSE, though, has an institutional habit of blaming problems on others, or denying that problems exist. I know this for a fact from my own personal direct experience: I worked at SUSE from 2017 to 2021.

You are misreading bug reports, wrongly deducing things that did not happen, and mis-attributing blame. The fault here is yours, and secondarily SUSE's. It is not Ventoy's.