So the D2 Beta is clearly unplayable for a significant number of users, mostly PS4 Pro consoles and maybe more outside English speaking countries. Lets try and help the development team to determine the root cause by sharing facts rather than start conspiracy theories :)
Our new PS4 console is Greek and it is hot here now but I expect that overheating should impact other games so we ruled that out as two other titles play fine for hours even immediately after a D2 crash. Maybe my user ID with unusual symbols or characters combined with system locale doesn't help? Someone else suggested that crashes occur for them immediately after other public players join the game near Zavala, maybe a server side issue?