One thing that's important, I think, is to recognize in the moment that you're getting upset, that in that moment right there, it's not the design itself that's causing you pain, but your reaction to it. It's not gonna be like a "AHA! Cured." sort of revelation, but practiced repeatedly you'll start asking yourself whether that's the ONLY option available to you, or maybe there is something you yourself can do so as to not to suffer.
The second thing, and this I learned from Yoga, is to actively look for what's okay. When it gets pretty uncomfortable, I try to do what my teacher once said, which was to focus on the bits that feel well. In your case, the door might be shitty, but the roof ain't leaking; the new maps may be crap, but the electricity is on; Google maps is rubbish, but the phone's screen is working alright. It's not that one good design compensates for bad design, it's that the poor design is enmeshed in a far bigger picture, in which there are good things, and it's your freedom, perhaps the greatest freedom, to choose where to direct the attention to.
Third, I've rarely seen a brilliant first iteration of anything. Every so often it happens, but more likely is to start with something and get better. So the map replacement is one: the vision for these screens may be 1. As a revenue stream, 2. Help the visually impaired, 3. allow more functionality - like calling a staff member quickly (whatever, I don't live and NY, this is just examples).
The implementation is rubbish, but if it's the first iteration, that was always ever going to be the case.
Finally, here's a bit of mirroring, do what you like with it: Clever people take great pride in their cleverness. They like that they're smart, and they like the sharpness in their brain. And so, this often creates a blind spot to how miserable that smart brain of theirs can make them. Like in your case, where you said: "oh, I don't think treatment can help, but if you could list some ways in which it might" etc - that's your proud clever brain speaking, entrenching you in a position where you're just angry all the time. But the rest of you recognizes this is a shitty way to be living, hence you posting to begin with.
So maybe there are some time when it's quite okay to tell yourself your clever brain is actually getting in the way, and use things that are not reason-based, like trust, and emotional monitoring, and get help from someone who worked their whole career at helping people deal with anxiety and anger.