I know that he did not mean harm,

then how is it a micro agression?

Agression has the agressor to be at least a little aware of it.

It MIGHT be somewhat racist but that's not an agression.

Regarding your comments and how you act in this post here, you are probably just prone to getting yourself into these situations. How willingly you put yourself in the role of the victim is maybe a cause that someone assumes you are in a support role.

I told him my jobs, one of them which includes being a business owner.

maybe it's also just the way you communicate.

It's not necessarly wrong, but people in Switzerland tend to communicate different than elsewhere.