I had a career as a professional software engineer. But my experience wasn’t in programs running on Windows and using “keyboard shortcuts”. So I can’t disagree with comments about QA for that type of bug.
As an end-user, I’ve been using DOS/Windows programs since the 1980s. I am used to finding input problems (keys or keyboard shorcuts that don’t do what is expected) in countless programs and having to work around them or avoid them. This year I am sure I have encountered problems in EXCEL, in licensed Forum software, in LingQ, in DuoLingo, in Busuu and elsewhere.
Life is too short to be upset because something isn’t perfect. Expecting perfection leads to disappointment. Demanding it (see title of this thread) is silly.