In fairness, we're all getting the game at the same moment. Some of us just woke up a lot earlier.
This. I get the frustration of OP, but timezones are to blame here, not Steam. If you get to play on 10am in Germany, release date for US would be in the middle of the night. And you would still play at the same time.
If course I get what timezones are, I'm behaving childish right now, I'm not stupid

But don't worry, I took no offense here, currently I'm trying to be ... less of an ass?
What I dislike isn't timezones, but that Steam expects the game to be launched at a time convenient for their offices, instead of, as most multinational companies do, having offices at least per continent.
Hell, I don't expect one per country.
This way releases could be at least in a matching timezone for the developers of a game. Which currently is just not the case.
Yeah I've ranted about Larian too and those points I still see as valid, but I still wish them all the best. Think about it that way. Steam forces them to work overtime, because Steam doesn't want them to release at Larians convenience but their own.
That is indeed Steams fault.
And once again, I think it'd be only fair if a game produced in Europe would launch there "first", meaning at a european convenient time and add timezones to that for all others. It's the other way around all time.