Any good journalist will ask you challenging questions.
It’s their job.
The idea is they put you under pressure, test your ideas and business, give you a damn good grilling; and the audience makes a judgement about you based on your answers.
This means you’ll have to handle questions that are critical of you.
Handle it badly, and you’ll come across as defensive, negative and unconvincing, and no-one will believe the ‘positive spin’ you try to put on things.
Here is a simple technique to help you handle criticism in interviews.