It will get multiplayer released, if you have a look at some of their (mostly) monthly updates you’ll see that they’re making consistent progress, though likely not as fast as anyone (including the devs themselves) would prefer. They’ll be releasing MP to the Community Testers in Q1 (presumably Jan-Mar, though that could be taken as Apr-Jun if they mean Q1 of the tax/accounting year rather than the calendar year) & then to everybody else at some point after that (how long we have absolutely no idea).
If MP is that important to you, as it is to many, just take a “break” & play some other games until it’s released. IMO there’s no point in playing a game that you’re not actively enjoying (for whatever reason).