Am I wrong to tell my husband that I refuse to repeat myself anymore?

He refuses to get fitted for a hearing aid. It makes things hard for me and him. After years of this I put my foot down. A few months ago I earned him I wasn’t going to repeat myself and I’m sure as helI not going to to yell. That’s just rude to everyone around us.
If say something and he says “What?” now I just say “Nevermind.”
Even worse, when he can’t understand he makes some assumptions that it was some disparaging remark and he’ll get mad.
If he isn’t going to take care of himself I’m not going to enable him.
Am I wrong?