This page is rendered in the browser, so there is nothing to read in its source. The same lists are served as data, and that is what to fetch instead:
/api/export/<type>/<username>
<type>
films
tv
games
books
/api/export/<username>
?format=md
?limit=200
Both include every entry with its metadata, its score and its notes. For example, /api/export/films/nil is what /films/nil draws.