They started the hiring process without communicating with necessary stakeholders and wasted the time of the candidates as a result.
They didn't know what candidates they need and had a terrible vetting process. Was told they were looking for a candidate with a totally different requirement after passed 3-4 interviews and was expecting a final offer.
They arranged the interview with a time slot that only asked for your availability hours before.
Probably the worst company I've interviewed in the past decade.