My 13 year old.
He's not 'typical' in the sense he had a life limiting her condition so we're dealing with normal teen difficulties and 2-3 hours of medication and physio on top.
It's a huge power struggle.
For instance,
DS has to do some physiotherapy everyday, this involves breathing into a machine that inflated his lungs, he has a goal number to reach which relates to the volume of air he's breathing in.
He only wants to do it by himself so he doesn't have to reach those numbers making the whole process pointless.
If an adult (me or DH) want supervise he point blank refuses to do it. If we pull rank and say that we're supervising he says stuff like 'well I'm not doing then so just know you're making me ill by not allowing me to do my medication how I want.'
This is the same with food, he's desperately underweight but if we're not feeling him what he wants wen he wants it then he refuses to eat and we get, 'when I lose more weight it will be your fault.'
He had a psychologist, he had doctors and nurses and physios and dieticians by listens to none of them.
I don't know how to place boundaries and deal with this, if it were any of the other kids hey get told, eat or go hungry.
Then there's the dreaded screen time. They have an hour a night on school days, they all struggle to go to bed and get up again.
We had a run of DS taking devices had been or up at the end of the night and sneaking them into his room. That earned him a ban for the day and he did the same thing again so in the middle of the night he was up on his phone! He doesn't seem to 'get' consequences at all and it's draining.