The Featured Store interview questions

The interview was okay but the manager was so rude and unprofessional via text post-interview when I've decided not to take up the job after reading the other reviews from both glassdoor and Google. When I have kindly and politely informed him that I will not be taking up the offer he was malicious with his reply saying word for word "Thank you for wasting my time" and "Not coming say not coming. Don't waste other's precise time. This is basic manners." And after sending me these 2 messages he deleted them and thinking I have not seen them. Firstly it was very unprofessional of him and secondly he is just straight up rude. So please do consider if you are planning of wanting to work for him.