Looks fine To me, White balance measured on the Grey Fields of the Checker is in fact correct.
Might look strange because the Colors are quite muted. Thats because this seems to have an rather flat color profile.
Such a color Profile does in fact make more work, since you will have to do Grading on every single Shot (or just set some Standard Grading up on your software), but will allow for much better results, since you have tons of control in post production / editing. For example, if the Camera Output allready had tons of Contrast and Saturation, you would have a hard time to undo it, but you can allways add effects like this.
Attached to the post is a VERY Quick Edit of your image, i Literally just added a little bit of Color Vibrance and some Curves to do very basic Contrast and Level correction, and it allready looks like something most Point-and-Shoot Cameras would output colorwise (good ones...).
So what you need is propper grading, i dont see anything wrong with the image output here. If you want to have /need even more Vibrant Colors, just push the Grading harder than i did, you have tons of room for color editing with footage that good.
Hope this helps.
