Hei, Nebula! *wave wave wave* Very thought-provoking question.
My main coping strategy at the moment is mindfulness, combined with what I call "borrowed confidence" (using the memory of past successes to ease the anxiety of current or future situations).
...great thinking. I know I am occasionally confronted with recurring situational fears and generally deal with each as an individual problem. You've suggested a tool that I've never applied ....now I do feel a little silly
As for borrowed confidence, I can give you an example of highway driving at night. (I play in a few bands that do the occasional out-of-town gig, and we usually come home well after dark). I'm a city mouse: I'm fine driving around town, but if I know I'm going to be driving on a rural 2-lane with no streetlights, I get anxious. The last few times out, I reminisced about previous successful trips home and the anxiety dropped immediately.
I have done massive amounts of rural driving, and the best tools I've found (aside from alertness) are extra spotlights (like rally cars) and yellow tinted glasses.
I don't know what it's like in the states, but good strong spotties are life changing if the road is not busy, and even if it is, you can get them wired in to dip with your normal highbeam, but only come on when you want them. The yellow tinted glasses break down the glare of oncoming headlights without losing night sight.
Re the OP being alive can be awesome enough to override malaise. I am v strong atheist, but I regularly experience a sense of glorious wonder at the immensity of this universe and my/our obvious connection to it. A god is not required for epiphanies, nor to remember that, whatever the life dilemma you are confronted with, being alive to experience life is the true wonder.
Re dealing with the unreasonable inconsiderate and stupid.
Well first up, there is no dealing with them, they are incapable of reason, incapable of considering your perspective, and too stupid to ever realise.
I think I'd take them for a long long rural night drive, and eventually try out my new ejector passenger seat.
Seriously, if they were as bad as all that, there are HR methods of resolution that can be applied.
As far as personal anger at their shitty attributes, I'd just let them know that I would not tolerate their bad behaviour impacting on me personally, and that I would take it as an unwelcome invasion of my personal space and well being.
If this proved futile (as the described parameters suggest) and it was truly relentlessly unbearable then I would involve higher authority if it existed, or just change my universe by leaving.