I hope I'm not misreading this but you seem a little burnt out. It's hard when you're the only one acting as an adult and professionally towards the nuts or those who believe you should be a 7-11.
Here are some examples, hopefully one will work with your situation.
If they're requesting after hours services, remind them the office is closed but you're glad to help them when the office opens at X'oclock. If they're banging at your door, when you open it and before they get a chance to say anything, ask: is this an emergency? That always catches them off guard. When it's no, refer to the first sentence of this paragraph.
If they're acting out of control you have every right to ask them to calm down, stop shouting, don't wave your hands in my face or point, and if they refuse to cease you have every right to tell them to leave your office or your door. If they refuse, tell them you are contacting the police, then do it. And always if it gets physical immediately 9-1-1. Let the tenant try to justify their action to the police.
To take it a step further we have a rules clause that clearly states how residents are expected to treat other residents, guests, vendors and property personnel. When they violate this rule with their self-entitled tantrum in which they attempt to objectify the staff by treating them any way they want to, including banging at your personal residence because they think you should still service them at whatever hours, then they are served with a very strong warning, with the rules clause inserted, and advised that further violations will result in termination of their tenancy.
I tell staff as well as remind myself occasionally, if nothing else make sure you behave professionally and don't engage with residents, that way if this gets bounced around between attorneys there's nothing that can come back at you.
But, if you just have to get into it, start with "Hey I am a person too you know!"
For those who like to play hard ball and claim discrimination because you pushed back and didn't let them walk all over you, remind them this has nothing to do with fair housing and a jerk does not have protected class status!
And as Amanda said, when you enforce the boundaries the nuisances that take away from your personal time will quickly dwindle. In other words, "resident training". I'd be interested to hear how it works out for you. if you need to occasionally vent, I'm all ears