A few months ago, Squarespace went back to the more integrated UI for uploading/searching your uploading files (pdfs, docs, etc) and linking them on a page. The previous, more-independent window of uploaded files, was replaced with a small, more-integrated list (isn't this what it was like in 2019 ish, too? anyway...).
This update/reversion has made it really hard to manage clients' libraries of PDFs, especially as long-loading times + unresponsive UI in the editor now accompany bloated libraries as of this update. Which, in turn, makes it difficult to clean/alleviate the problem, especially in this smaller, more cramped UI.
I filed a ticket, but was hoping someone may have a solution after having a similar experience - this update is kicking my butt.