You can also find all comments from a user (can be you) from the profile page of that user: there are links below the description entered by the user.

To go to the corresponding page from the comment search, you just have to click the page title in the left column (car model or movie title)...
The small lozenge link is available only on movie/car pages because it is allows you to get the link to paste it somewhere else (as direct link to a particular comment).
I could indeed add it on the search page for a more direct access in case that the target page contents a lot of comments.