Abbey Support interview questions

We have the Teams interview. The employer talk about their company background and what do the company do. How much customers they have and most of the things. Then he ask me about my background and some technical questions. When we talk about the experience, he said that I think you work in a task for a long time (just like solve a problem in 5 days).. but we need to solve the problem as soon as possible..That make me feel bad on this. If the employer already have that bias on me...why you still interview me? Just a waste of time in this interview