CKEditor

Raised as a usability problem by 5 people on Hacker News over 10 years (2011–2020), in 6 threads.

People raised many different problems with CKEditor, but no single problem has yet been raised by 3 people in 3 different months and threads.

Unreviewed issues were grouped by machine: Claude Haiku labelled each comment as a usability complaint, named what it's about and summed up the problem in a line, and a small model grouped similar problems. Nobody has checked them by hand. Expect mistakes.

The newest 6 complaints

Editor hijacks standard Emacs-style keys, so Ctrl-B bolds text instead of moving back2020-12-13
Ctrl-B and Ctrl-K are hijacked for bold and link, breaking expected cursor movement2020-09-06
Default UI is not working well on smaller devices, conflicts with native mobile controls2019-04-03
Code is hard to debug: minified bundles and unfollowable timeouts force developers into painful workarounds2016-02-22
Documentation is overwhelming and unclear, making customization hard to figure out for newcomers2014-12-18
New CKEditor design is so bad it hurts usability2011-08-09