I think they have more issues than just a mistake of managing expectations but maybe something to come back to in a year or three
https://www.gamesradar.com/diablo-4-...-right-things/
Diablo 4 boss addresses disastrous Season 1 launch: "we felt like we were doing the right things"
GamesRadar+ has spoken to Rod Fergusson, Diablo general manager, at Gamescom 2023. When asked about the Diablo 4 player base's overwhelmingly negative reaction to its debut season, Fergusson states that "one of the things we recognised early on was that we had made some sort of mistake in managing expectations. It was hard because we felt like what we were doing for the game were the right things to do."
Fergusson comments come hot on the heels of Blizzard unveiling Diablo 4 Season 2 yesterday at the Gamescom Opening Night Live showcase, complete with an October 17 release date. Fergusson and company will certainly be hoping they can right the ship, and so far at least, things are looking up, as the sophomore season looks set to exorcise one of Diablo 4's most tedious grinds.