Uncountable Scientific Implementation Associate interview questions

One of the founders reached out to me on LinkedIn based on my background and I scheduled an intro call. The intro call was half an hour and we discussed my work background and the company. I did note that not much was discussed about the particular role they had in mind. I was sent a take home exam that I had 48 hours to complete and I spent ~6-8 hours completing it. The take home is time consuming and detail oriented. Any mistakes I ended up making were my own fault, but it does take a lot of time. After sending the second take home back, the interviewer put a follow up interview on my calendar. I was peeved upon joining the call because the interviewer appeared to be in a vehicle/was driving and told me that the service was spotty because they were driving through a spotty area. The interview was conducted as normal, but it was oftentimes hard for me to hear his questions due to his service which was frustrating. I got an email a few days later saying I did not get the role, but I don't think I would have continued in the process even if I had moved to the next round.

I was 'interviewed' by company's co-founder and had the weirdest and tactless interview I have ever had. Co-founder didn't bother to ask any questions about my background nor give information/context about the call, even though they were the ones who reached out to me and asked for the interview..