E2i interview questions

Their controls engineer interview is four steps long. It took six weeks to go from the 1st interview to the 2nd, and two weeks later I have not received feedback with the 2nd one. Even if I presume it is a no, this is far too long to drag out a process, especially when in both cases they made it sound like we would move along to the next step within a week. It did not help that in the 2nd interview I got several questions pertaining to why someone in my field would be applying, which makes me wonder why I was chosen to go to that interview in the first place. It's simply far too slow and inefficient of a process.