How did I do? Had a photographer completely shatter my inspiration

I own a small catering company and with that I post on instagram and Facebook. I had gotten this camera to take photos of events and displays that I set up. At a recent event, I connected with a photographer who wanted to check out my camera. He took some shots with it and then said this is just a mirrored camera and that I should have gotten something better.

I did some brief research before I bought it and thought Cannon was the way to go. I went to Best Buy and got it for around $500.

Now I don’t feel like using it as much because I was let down and told it’s nothing special.

Any advice on how I can improve the camera? Any courses I can take?

Thanks in advance :)