Consider taking a photo of the mural without adding a filter. As said by the artist “Well it’s like this. If you went to a restaurant and ordered some fine dinning; the chef would ensure they put the right ingredients in to create a dish that suites the clients needs. The client then treats this dinning experience that took time and dedication to make as if it were a cheap burger putting ketchup or other sauces (“to make it taste better”). 
I know this is subjective to people’s point of view however it is frustrating knowing that people can’t except things they way the are. 
If my art is bad that is okay I want to know what I did wrong. If the remedy for everything is to pour some ketchup on it than I will be delayed from my learning experience.”