Lucid Motors Senior Software Engineer Android interview questions

I applied on LinkedIn. Received a call from the recruiter and we had a chat about the job requirement and where do I fit in. Pretty good conversation. Scheduled a technical phone screen with a Senior Engineer, most of the interview was around knowing what do I know and what technologies Lucid works with, pretty interesting. Towards the last 15 minutes we solved an easy coding question. Cleared the technical phone screen and was scheduled for a virtual onsite, this is where the issues started happening. The recruiter at this stage started behaving very weird. She was not willing to have a phone conversation with me regarding the onsite interview process and how many interviews there were gonna be. On asking several times, she kept on answering there will be 3-4 interviews talking technical. To top it off, eventually she asked me to talk to the scheduling coordinator, about the interview process. I hesitantly scheduled the onsite interview and was scheduled for 5 technical interviews over 2 days. The onsite experience was horrible, the interviewers kept on going deeper and deeper into concepts I was not familiar with. Android Auto and AOSP is not something I have done, still they kept on grilling me over these topics and expressing dismay that I am not proficient in their technology. Got an offer 2 days later. Now, the recruiter would not stop praising how good the company is and what BS benefits they offer. Then she threw the curve ball - they wanted me join as a Junior Developer with a drastically reduced salary then what I asked. Clearly they were not gonna pay me the money up front so they wasted all this time. My biggest mistake, disclosing my salary expectations to the recruiter.