Amen with what you say about job hunting: its excruciating and stressful, specially if you are somewhat introverted like me. Just going to the interview was hard for me, and rejections are just plain hurtful. I got a lot of that before starting working in IT. That doesn't mean I got accepted at all interviews, just that there wasn't any outright rejections, and that in the meanwhile, I got a job.
And I totally agree with you on the frustrating hell of writer's block. I'm a writer, also, and I had my share of blocks. Which are all the more frustrating when you are down, which is when you more need to get thing out of your chest, sublimating through your writing. What I had found in my years of writing workshops (what I think is an appropriate translation of the spanish expression "taller literario", where people joins to write, read, criticize each other writings and try different exercises), is that mechanic exercises help to unblock. Some examples:
1) Automatic writing. You simply take a sheet of paper and start pouring on it the first thing that come to your mind. Helps if you try to conform to a genre, but keeping the spontaneous nature of automatic writing. Works surprising well in poetry form, with free verse and no rhyme. Just write short "automatic poems" or whatever. Hopefully, after some tries you will find that your writings start taking form, you will start giving a structure, giving it a planned direction and such. By then, you will have given a significant step on unblocking you.
2) Some mechanical pointless writing. I don't know which other name it. It means start writing something on a dry manner, without a literary objective in mind. I mean something like take an item, examining for a couple of minutes, and start describing it in minute detail. It helps if you try to avoid naming the item in question. Or you could describe someone. Or (one of my favorites) try to describe the way to do an everyday action (like climb up some ladders). If you are lucky, soon you will find trying to give it a literary value by enriching it with metaphors and other nice things. Maybe even you will produce something worthwhile. And it will give you some practice with the use of adjectives (they are necessary, although not in excess) and with descriptions that, even if you don't like to waste too much words on a description, it will help to improve your overall writing
3) Exquisite corpse. It only works if you have somebody else with whom to try it. You could find it explained
here, maybe. A variation is taking turn to write a story, but being capable of reading the other participants parts. That way it could be a coherent story and you could try to give other an interesting twist or just trying to complicate things for the other participants.
These are only some examples I could think now on top of my head. These exercises have helped me on numerous occasions and people I know. The idea is trying some of these exercises, a few each day (or whatever time you have to sit down and write) until feeling the block dissolving. It helps if you have a writing habit, like writing always around the same time of the day, or while listening to some particular music or whatever, although that could easily become a crutch. Just don't try to force you to write, do some exercise and you will feel when you are ready to try to advance your story.
Also, I find useful to write in a situations in which stimulus and interruptions are at a minimum (night is the prime time for this, in my case).
I hope this helps you.