3:49 PM, Wednesday February 12th 2020
I agree with Loopkin.
On your rotated boxes you have quite a lot of parallel lines. As the boxes rotate the vp should move. Take look at this section again https://drawabox.com/lesson/1/16/rotation for when you do warm ups. As Loopkin says, this exercise is really hard and you aren't meant to get it right yet. It's there to introduce you to the concepts of 3d space and using lines you've already drawn to work out where the next one should go.
Good luck on your 250 boxes!