ye as topic,i have bought d4 on steam,but i find that there is nobody in this public chat channel?damn,that means I'm playing a stand-alone game,even though I can meet people from other platforms in-game,what should i do to make this 2public channel connects?or it cant do that at all.

just treat the game like a single player one, that way you don't get disappointed with things like the above

but its actually a multiplayer game

But it really isnt

The trick to selling snakeoil is you don't tell them it's snakeoil. People still haven't figured this out.

while a global channel would be a good addition, a workaround you can do is join an active clan and then you have an active chat/people to group with

D4 is multiplayer but it isn't social. You should play as if its single player unless you have someone you met elsewhere that wants to play at the same time.