I'm fairly young (mid-20s) female who has been given an assistant (man, about a year younger than me) to train and for me to delegate any relevant work too.
He has a lot of social anxiety but seems inwardly very determined, cold and easily irritated. Most people I've met with social anxiety have been very nicey-nice, people pleasers, with an excess of patience and tolerance. He generally seemed the opposite yet what confuses me is sometimes, he will be visibly trembling, stuttering, unable to make eye contact with me yet at other times, he will misunderstand something I've told a colleague and go into an inward fit of rage with bunched up fists etc (sat by himself so not directly at me) and he can take a very cold and abrasive tone with me. He is also not very flexible and will get very irritated if I change a task I've given him (sighing very heavily with a stern look on his face) even though even with the change of plan, it's a relatively small change, with 3 days notice but will then seem very "obedient" and say okay, no problem etc, and the entire company is having to cope with huge last minute changes - that is very much part of the job of working in a development company.
So, I'm left feeling uncomfortable either way. When he seems all nervous around me, I feel like I'm walking on eggshells with him and then I feel the exact same (but in a different way) when he's blunt and abrasive with me. It's hard not to take it personally and I feel ridiculous to feel almost bullied by my own assistant!
When I've had to be the assistant in the past, I've always been too much of a nicey nice tolerant doormat so I'm surprised to see this kind of behaviour from him.
I can't bring it up with anyone senior as they regard this kind of thing as rather minor.