The discussion revolves around CSS regressions and customization options for sub-sub-categories. almereyda reports visual glitches and proposes hiding sub-sub-categories from the category listing view. However, nbianca is unable to reproduce the issue.
As a potential solution, Heliosurge suggests adding CSS code to hide sub-sub-categories in the hamburger menu, referencing a similar solution in the Category hider theme component topic. The idea is to request the theme component author, Keegan, to implement this change.
After activating the third layer of sub-sub-categories, as explained in Sub-sub-categories - #7 by Michael_Uray, we are observing certain regressions of this (undocumented) feature.
Looking at the visual glitch described in Hide sub-sub-categories from /categories listing?, it seems the CSS for subcategories does not apply to sub-sub-categories equally, probably due to some kind of selector issue.