Recorded Future interview questions

Screening with HR was very pleasant and gave me good confidence I had the level of experience they're looking for. After this, I went through several rounds, meeting every manager I would be reporting to separately, instead of all in the same call. This took around a month. I was then told they're looking for someone with a lot more experience. This was a very frustrating process, how did it take them a month with 4 different interviews to realise I don't have the level of experience desired? It seems it would've made more sense to tell me this in an earlier stage rather than having this loop interview, and wasting everyone's time. The interviews were not too hard, however not very pleasant, with a lot of check the box questions, rather than focusing on the relevant experience I had in the area. Seemed like they were looking for someone who already knew everything and could start tomorrow.

The interview was not easy and there were several rounds. Had to meet each manager, I would be reporting to. The process took over a month, which I feel is a bit long.