Final answer:
There is no clear description of Ulla's dislikes about the bathroom or her critical views in the provided text. Additionally, without the mentioned article, no opinion on Carlotta Walls LaNeir's stance on transgender bathroom use can be discerned.
Step-by-step explanation:
Based on the provided text, there is no clear indication about what Ulla does not like about the bathroom or what she is critical of. Instead, the text describes a bathroom with a removable roof, and Ulla's culture places great value on love and truth, where lying is considered a serious offense. When addressing the question regarding Carlotta Walls LaNeir's position on transgender bathroom use being a step backwards in history, it is imperative to read the article mentioned above as this information is not provided. Simply from the excerpt provided, that position cannot be ascertained. The case study about Bintou and Maeva experiencing long bathroom lines at a party seems to point toward the fact that high consumption of alcohol can increase the frequency of restroom use, but it does not link to the issue of Ulla's opinions on her bathroom or the broader issues of bathroom accessibility and etiquette, which are central to discussions on transgender bathroom use.