The article seems to want to pain as negative a picture as it can, taking the position that the Mercedes partnership may be a negative because Rivian cautiously (and properly) caveated the investment as not factored into their operational capital flow, when ninety percent of the companies I've seen would be fundraising on that fundraise. without shame and without looking back.
As for treating their initial reservation holders better, I don't think the CEO will ever be forgiven for the way he sprang the price increase on them, regardless of his quick about face on the matter. The company most assuredly could do better communicating actual useful information instead of warm and fuzzies with nothing actionable.
And finally, they need to come-to-Jesus quit shipping at a rate that doesn't allow absolute quality of assembly and requiring multiple service center visits. Whomever convinced the CEO that shipping anything to be repaired later did the company absolutely no favors.
I don't see many companies trying to build a multinational manufacturing operation from scratch these days, much less starting just before Covid kicked everyone's asses. Rivian will, eventually, be fine.