So you are trying multiple Linux iso using ventoy without any success. The reason behind the failure is ventoy installation method and those iso not supporting the method.To boot an ISO (it doesn't matter which one because the same thing happens: Ubuntu, Fedora, Linux Mint, Pop OS, etc.). I use Impression (for a single one) or Ventoy (in fact," it doesn't matter which programme I use).
You can try "porteus Linux iso" and "slax Linux iso". I think this two will work. Give it a try ( both are small in size). If these two works than you have to follow traditional way to try or install ( Ubuntu, mint etc) not the ventoy way.

