MATURE workplace advice - how can I stop hatin?

Just because you were hurt and the employer COULD have made accommodations for you to work from home, it doesn't mean that he HAS to do so. You work at the convenience of your employer, not the other way around. An executive istant often times has demand put upon him or herself, because that's your job. Your boss is a busy executive, you are his right hand, to pick up the slack. As for sending you voice-mail instead of email, if that's what he likes, its his prerogative to use his preferred communication method. If you do this much for this man, use this leverage to get a pay raise to the point where you are happier to do the work, because you're getting paid for the crap that you're being asked to do.