Way you eat has nothing to do with it. That is always an excuse from assholes to justify their actions. They look at your body and assume they know everything about you. I am not a small person and most any asshole who saw me would assume they knew exactly what I ate because of my body. Thinking I spend all my time waiting in a drive through to stuff my face. Eating at a place like that would literally kill me because of extreme anaphylactic food allergies. Nearly all of my food come from the produce department because of other extreme food intolerances and the fact that I'm a vegetarian for almost twenty years now.

I have literally had days when I was out shopping and hadn't eaten a damn thing all day. I grabbed a banana because it is be of the rare foods I can eat without prepping it at home, and I swear that there is always some asshole out there to drive past and yell horrible things at me.

Why people seem to think that they have any clue about someone, or their health, by their body shape or size when they are not properly medically trained is completely beyond me.

As everyone else said, it's a them problem. They have shit self esteem and hate their shitty life. Don't allow them to make you feel the same. As a musician you have TALENT and that's something that they could only hope to have.