That's not my understanding of micro-aggressions [1]. IIUC, inadvertently doing a micro-aggression isn't being an asshole, but persisting in it after it has been pointed out definitely is.

[1]: Disclosure: I'm a minority (disabled), but I'm also a white man.

The question is whether everything that is called a micro aggression is one.

Ever heard of the Law of Penetrance of Negative Residues?

Your assumptions about micro-aggressions existing are wrong. "Don't be an asshole" is (or should be) about how you act towards others not how others perceive your actions. If someone wants to be offended, that's them not being cool.

I feel offended by woke people.