Sounds like you’re not preparing enough or not familiar enough with the role they are asking you to do.

All I can say is brush up, smile, and don’t put too much pressure on yourself. It’s not like you’re unemployed.

And you’re obviously capable of doing something as you’re employed so have some confidence in yourself

The brick – then how do you explain that 20+ years of research consistently shows competency based interviews (these are the example based questions you think are a sign of a bad interviewer) to be among the best predictors of job performance commonly used? For comparison an unstructured interview is barely better than chance at predicting performance in role. If you’re interested I’d recommend reading papers by Frank L Schmidt.

As for not demonstrating problem solving or thought process, I’m sorry but that’s exactly what competency interviews do.

in one job interview that I had decided i didn’t want the job for I got asked “why should we hire you?”

Because I am not a **** idiot was my reply.

rather than kill the job dead I got offered it.

turned it down. there and then