First, it's people without even most basic aeronautic backround designing an aircraft.
Second, the number of flaws with their scheme being pointed by experts is so huge they cannot possibly get certified without throwing out everything, and redesigning completely from scratch.
Third, they finally hired somebody with the background, but so far nobody seen any change from "submarine ramen startup," to a serious company happening. Unlike with SpaceX, where Elon promptly yielded to professional engineers shutting down his fantasies like an SSTO design, 3D printing the whole rocket, or developing an ion engine to replace chemical one for last stages.
Fourth, they lash out on all criticism with "you have no vision," it's "aircraft 2.0," and similar dismissal.
Fifth, they courted investors with physically unachievable performance figures.
To me it's very clear, the company is heading the way of "HTML supercomputer"
P.S. Speak of the devil, it's already starting: https://www.bloomberg.com/press-releases/2022-06-02/lilium-i...