Why do you want Diablo 4 to fail? The ONLY admirable part of Diablo 3 was the combat and that's not really saying much in this day and age. I mean, if you screw that up, what are you doing even creating video games? The level system was bad in D3, the loot was bad, the environment was bad, the story was bad, the skill system was bad. Diablo 3 was a steaming pile of garbage.
A bit rude, but exactly my thoughts
Have you ever played Diablo II?