Hi, well done for making it to the other side hope you're still alive

Here are some of my thoughts:

For many of your boxes, the lines seem not to be converging towards each other but away: https://imgur.com/7gtkmeX

This gives the impression that the back face of the box is bigger than the front face, which messes up perspective.

One way to remedy this may be to avoid drawing lines that are almost parallel to each other, but instead make them converge more significantly towards each other.

One way to improve the convergence of your lines is to start thinking about the angles and relationships between ALL the sets of lines converging towards a certain vanishing point, not just one pair. This diagram may help you understand what I'm trying to say: https://i.imgur.com/8PqQLE0.png

If the back corner is giving you grief, try this alternative method of drawing boxes that some say have helped them: https://imgur.com/a/DHlA3Jh

If you prefer the normal method (like me) that's fine too :)

Hatching on the whole is quite neat, remember to keep them evenly spaced out.

Lineweight should only be applied to the outline of the box: https://imgur.com/undefined

One superimposed line is enough to keep it subtle.

There are extra lines on some boxes which makes me think you're repeating "bad" lines, don't do this, just accept it and move on.

Lastly, draw bigger boxes! This will force you to draw more confidently and it will be clearer to visualise how the box is situated in 3D space.