Max can be third, but Office is probably the second biggest computer software there is behind Chrome. Office is largely the entire reason people use Windows. Killing the brand that made you the world's biggest company for a long time is rather unprecedented.
HBO's was bad, but it's just the fourth place streaming service in its primary market, so the scale is pretty minor comparatively.
It might be worse for the users, but if we factor in the user base just a tiny bit.. (I don't remember watching anything branded HBO in my life, outside the US)
In 2011 Netflix announced it would split its DVD-by-mail and streaming businesses. The DVD business would be called "Qwikster", which was mocked. Eventually they reversed the decision.
Besides the goofy name, people thought the move was premature. Netflix wanted to go all-in on streaming. The catalogue was a lot more limited back then, though, and the DVDs helped bridge the gap since a lot of movies and TV shows that were unavailable for streaming were available by DVD instead.
The executives in charge at that point made a lot of money on the "90 Day Fiance" "franchise", among other badly and/or dully and/or grossly named things. IP and branding wasn't exactly their strong suit.
It wasn't bad because of the branding. If anything, the MAX name was kind of understandable since they ran out of hundreds they'd previously used to indicate variants and revisions.
Except the whole point of the fiasco is that this was a NEW airplane, not a refresh, but it was named and regulated like a refresh. That led to people dying.
HBO's was bad, but it's just the fourth place streaming service in its primary market, so the scale is pretty minor comparatively.