The first couple of rounds were pleasant. I'm new at IAM but very experienced at the TAM role, and expectations were set that this was acceptable for the role as long as I was a willing learner. The third was a technical screening focused on IAM technical acumen (which I had already expressed that I didn't have). If expectations had been uniform, less time would have been wasted. Additionally, one of the technical screeners called me "non-technical" (though I had already explained I spent over a decade as an engineer). Insulting at best.