discomfort with anger, civility, and diabetes

I have been meaning to write something about diabetes and class. And then I was going to write something just about diabetes and things I've been thinking about my experiences since I've had to life more within them (and more constantly) lately with the problems I've been having. But then I got lazy. And then I got into an argument with my dad, so this is what I wrote instead. There's a lot of other things I want to bring out eventually, but too tired now.
PS I don't hate my dad, and this isn't meant to be a personal attack. I'm just frustrated and it illustrates really well what I think happens in a lot of situations.

my dad is so into civility and doesn't like anger. so frustrating to communicate with. since he can't deal with anger, frustration, or conflict, he can only discuss things on his terms or not at all. I asked him (i worked so so hard to be nice and "rational" and articulate cuz i knew this would be an issue) to stop 2nd-guessing me when I say i know what the problem is and my pump isn't working after another incidence of him continuing to second and third-guess me even after i spend a lot of time/energy laying everything out. and i said my anger was healthy and necessary and part of life.

now he says he won't discuss my diabetes with me anymore if that's what i want. it's not, i just want to discuss it without being constantly 2nd guessed. or if i "all i want do to is express my anger" (cuz clearly that's incompatible with conversation or intelligent exchange, of course). i was trying to stay understanding and communicate well with him, but it didn't work. he legitimately has some emotional issues with avoiding conflict i think, but still not fair and a cop-out. he got just what he wanted - this conversation about my diabetes doesn't occur unless it is on his terms, unchallenged. and it's so about upholding a fucked up civility - keeping me from getting angry or us from getting in a conflict under the guise of trying to avoid somethign that upsets me (which is there no matter what, by the way, and it's his reaction, not my diabetes itself that i was upset about in that moment), rather than actually addressing my concerns and engaging with me.