As with many students, I think you're a little too self-critical. Your work throughout this lesson is really well done, and you're showing a huge improvement in how you tackle these tasks compared to that little bump we had earlier on. Admittedly a bunch of cylinders are a lot less interesting than drawing real things, but regardless, the patience and care you've demonstrated throughout this lesson is notable.

To start, your form intersections are coming along well. I think there are a few places where you forget your intended orientation for some of your forms, resulting in a bit of confusion in the intersections, but by and large you're showing a lot of progress in your understanding of how these forms connect to one another. One thing I would maybe suggest - it's not required, but might help - is to only draw the portion of the intersection line itself that would be visible for the viewer. Right now you're applying the usual draw-through strategy, which is good, but not required for the intersection lines. If you feel it helps you, you can certainly keep doing that, but it may make it easier to wrap your head around what's going on if you only need to draw the portion of the intersection line that faces the viewer.

Now, onto your constructions, what stands out to me most of all is just how willing you were to dive into all the specific subdivisions to pin down with precision each and every feature of your construction. This lesson is the first time we really explore the idea of subdivision, and most students will push into it to a degree, but will still rely a fair bit on approximation for some of the really small details. While it's not ideal, I've come to expect that as they ease themselves into producing this kind of forest of linework.

You however have dived head first into it, and have managed to keep pretty good track of which lines represent what. To start, I'm extremely pleased with your spray bottle, which required relatively little subdivision compared to the later objects, but made excellent use of ellipses, laying them out with considerable precision. While I assume you're using an ellipse guide for this, they only help so much. You still need to know where everything goes, how to estimate the proportions of your container boxes, and ultimately as you noted yourself not all required ellipses will be covered. So your success here is impressive all the same.

Looking at your iron and Honda Miimo, you really nailed down those smooth curves very nicely. Many students tend to forget about the idea of achieving precision with curves, and will see them as an opportunity to be more approximate. You pinned those curves down perfectly, achieving specific, accurate representations of those rounded corners, and doing so while establishing a strong impression of solidity in your resulting object.

Admittedly I'd say the shuttle - despite being a toy - was probably a better choice for Lesson 7, but you did a good job with it all the same.

Lastly, the hippo skull is really just an extension of all the praise I've given already. The sheer specificity of your subdivision and breakdown is mind-blowing, and the patience involved in tackling something like this is incredible. I am very happy with your results throughout the entirety of this lesson, but this one takes the cake. I'm sure you're getting lots of attention for it on the discord server, and it's all well deserved.

So! I haven't really had anything negative to say, but there's not much to pick at. Your work is fantastic. I'll go ahead and mark this lesson as complete.