We can felicitously say:
I am upset with your performance.
And a related idea like this:
I am upset with you.
Similarly, we can say:
I am disappointed with your performance.
And again, similarly:
I am disappointed with you.
My question is that while I know we can say:
I am not convinced of your ability.
I think we can't say:
I am not convinced of you.
Why are the above items all ok, but this one is not? And if it is not, how can we state that we are convinced of someone's ability in a similar form?