Try this:
1. Run sudo efibootmgr -B 0000
2. Don't rename EFI directory name, just rename the sub-directory EFI/BOOT to EFI/VTBOOT.
This time check whether you can boot into Ventoy.
1. Run sudo efibootmgr -B 0000
2. Don't rename EFI directory name, just rename the sub-directory EFI/BOOT to EFI/VTBOOT.
This time check whether you can boot into Ventoy.