Hire or reject?

I have been interviewing with this company and had my final round today with the hiring manager. It went averagely; I was asked a few questions about Kafka, but I couldn't answer them completely. I was also asked about the metrics taken for the application's performance, and I answered differently. At the end, he asked if I had any questions, and he said I did pretty good and will keep me updated. However, I don't feel like this interview went very well, as I have around 4-5 offers, and all of the other interviews went very well. They are also aware that I am an immediate joiner, as I am nearing my LWD.

YOE: 1.4