It's more of an anxiety thing. Anxiety is just common with autism, and thus easily mistaken the same thing.
In my own case, I'd likely get frustrated at worst -- on split second, I have to choose between acting out on frustration from holding it back and see what may come up as to why things don't go as expected.
It also more or less help that I myself am not the most predictable person. I could be competent at the moment, incompetent at next -- to say when things don't go as expected, it doesn't seem to be always a negative thing overall. Sometimes things don't do as expected indeed, when it turned for the better.
Instead of frustration, I get a form of overconfidence that either I have to indulge to or have to keep in check.
Suspicious on the outside for a minute, then all the sudden people would approach me for some reason -- and how I expect people towards me or how I might be towards people may be a good and not always a bad thing.
It's like me taking chaos and making sense of why is this. Yes, that sentence may not make any sense.
This might be why I don't suffer from anxiety. Because most forms of perceived unpredictability, uncertainty and the unexpected -- likely is the autistic thing part -- doesn't automatically come off as something overwhelming, panic inducing, a 'threat' or negative -- sometimes it just makes sense, sometimes I even relied on it.