Now make a video of what happens if you now re-boot using the power/Option (ALT) key ie can you see and boot from the USB ?
The bit you have shown other than creating the partition is not essential. As long as the partition is created and you have a valid USB with Windows on it, you should be able to shutdown then re-start/boot to the USB and continue the process ie you do not need bootcamp utility to do a re-start from the USB
I want to see a picture similar to this:
View attachment 637498
Here's a guide for doing it all manually
http://fgimian.github.io/blog/2016/03/12/installing-windows-10-on-a-mac-without-bootcamp/
As you have tried a 1000x already you may wish/need to delete the previous windows partitions created see the guide for that too