Has any company had a 100% perfect launch? Perhaps our willingness to accept issues is because no one has set the bar.
Oneplus started off invitation-only for the first three generations and their devices were very hard to get. The first iPhone was delayed and nearly impossible to buy at launch unless you purchased second-hand at a premium. Nexus and Pixel both had delays and bugs out of the gate, camera software included. In fact, I don't know if Google has ever had a smooth launch. The first Motorola Droid was both expensive and buggy. BlackBerry has had numerous problems in their BB10 and Android devices. Even the Samsung S8 launched with major Bixby annoyances. There are countless examples far worse than Essential so far. For a startup, they're experiencing average issues but in my opinion nothing yet bad enough to stop the show.
I understand everyone's frustration but if launching now with the camera still a work-in-progress versus delaying another month, launching now is arguably the lesser of two evils. I'm personally glad it's shipping now.