My colors look awful, I can't tell why
'Awful' is pretty extreme - I don't actually think it looks that bad.

Perhaps it's a little bit over exposed (the car is almost glowing, it's that white) so you might want to consider an ND filter if you're filming outdoors (and you can get one of those for your drone).

Colour-wise, it does look like it's tipping towards the blue-end of the spectrum. Maybe try throwing a little more yellow/orange into the mix. However, that could just be my monitor. Do, please, check your monitor settings, too, they may be throwing off your perception.

This guy seems to know his stuff in regards to Mavic colour grading: 
                
            

Maybe give that a watch and see if it helps :)