Fans have unrealistic expectations about QBs, to the point I don't think they even know what "ordinary" elite QB play looks like. Anything short of 2004 Peyton Manning/2007 Brady endless rocketball touchdowns and they want to cut ties and burn everything down... so they can go back to starting the guy they spent the last 8 years trashing because HE wasn't absolutely perfect all the time!
Maybe Dak could bust out of nowhere, sure. Anything is possible. But if you can't enjoy what he's been doing as a rookie, then you're never going to enjoy 99% of the football played by any team, because what you want isn't a real thing. You want video game dominance that doesn't exist outside the odd fluke year... most of which don't even end in Super Bowl wins, funnily enough.
The Cowboys don't need a perfect QB. They need a good fit for what they, specifically, need their QB to do. If you're trying to party like it's 1995 you don't particularly need (or even want, necessarily) the next Favre, you want the next Aikman. If you care more about style points and volume stats than team wins, then the team Garrett is trying to build will never make you happy, because it's clearly not how they're going about this.