I don't really have much to add. You are not drawing rectangular boxes but rather planes wrapped around the head. This often leads to wedge or pyramid-like shapes. (e.g. image 4, 5 and 7). In other images, you may have figured out how one set of lines through visible landmarks is supposed to look (e.g. image 9) but you made all lines going in the "same" direction pretty much parallel to that rather than actually converging them. It is more of a parallelogram than a box around the head. (same with picture 8). Rather than just moving the lines up and down, try to find some obvious easy to find lines (top of the ear to eyebrow, eyebrow to eyebrow, center of the forehead to middle of the mouth/chin) and then use what you know about perspective and how lines should converge in 3D space to construct the other lines, rather than "finding" them in the image. If that is hard, try drawing a lot of randomly rotated boxes floating in space. Also draw the lines you normally would not see as if the box was made from wires. When you have about 4-6 boxes on the page, elongate the edges and see if "parallel" edges actually converge to one point to check yourself (essentially the drawabox 250 boxes challenge). it is tedious but will give you an intuitive understanding of boxes in 3D space over time. Then you don't have to rely on just the image to find a box but you can rather use what you see in the image to construct the box with what you know about perspective. In picture 9 you also have the edge of the box that faces the viewer go through the corner of the left eye. Yet the outer edge of the box goes through her hair rather the the outside corner of the other eye. This the box is not centered on the face.

It looks like you're trying to taper the box to the structure of the head rather than to the rules of perspective. That is skipping. a step. The head moves in and out and heads taper in different ways, in their construction. That is something you'll want to capture, but in order to capture it in perspective, you'll want to first accurately draw the box the head is contained in.