larkjkj It's not exactly solved, but i managed to install it without any more complications.
nor will it ever be solved. too many variables. I have never had a 100% success rate exploring isos on Ventoy. More like 70%. Things like Suse, some deb derivatives, fedora kinoite (sp?) --stuff like that never opens (Black screen, blinking cursor).
( Solus Budgie, ironically, has always loaded in Ventoy for me. )
If Ventoy fails I burn the iso with Etcher to a spare USB = 100% success rate. @BuzzPCSOS listed a lot of factors that go into a successful install. I would argue Ventoy itself is a factor sometimes.
On a bizzarre note some things that would not boot on Ventoy would have success if I changed the bios to legacy instead of UEFI. Go figure, I cannot.
It's Linux, sometimes you have to fight for that victory, as you did. It's not a Solus thing by any means.
Enjoy the Budgie and welcome to Solus.