Really sorry to hear of the stressful work situation you're in, and wanted to offer up a slightly different suggestion...
Get a "day job" for now. A bridge, something you can do 'for now' while you're looking for the something better. Something fun, energizing - but that still gets you out of the house and around people.
I have a few family members who've done this. One is way into theatre lighting - but it wasn't so easy to get a full-time job in that field, so he got a job as an entry-level bank teller, within walking distance of his house. Not fabulous money, but decent benefits and it pays the bills. It also leaves him with enough mental and emotional energy to keep working theatre at night. Another person in my family *loves* acting, but again - not something he could do full time right away - again, a simpler "day job" while he continues on with plays and auditions. He has the mental energy to do it, and has a non-stressful day job. He just auditioned for a brand new television series, so we'll see if he gets it - but the thing is - his "day job" allowed him the space and energy to pursue acting while still being able to pay the bills.
I think trying to jump from a bad/stressful job situation into something much better is kind of a hard thing to do, and I think you're right to be considering getting out of there first. I know that sounds crazy, given the job market right now - but I'm suggesting getting a "day job" for now. Something fun. And you never know, that "day job" could turn into something better than you expected. Bank teller/theatre lighting guy has been promoted three times at the bank and is making a much better salary than when he started.
What do you think of this idea? A coffee shop? Sephora/Ulta where you demo mineral makeup? A fabulous gourmet food shop? A wonderful clothing store? Can you see yourself getting a job like this in two weeks? I can Putting intense pressure on yourself to get something better than your current situation, while still *in* a pressure cooker of a workplace makes things that much more stressful. I'm suggesting getting another job first before leaving the current one, but that you lower the bar - take the pressure off, and get a "day job" so to speak. Think of yourself as a very talented artist, but that the bills still need to be handled. You want to nuture and nourish your talent/creativity, and protect your energy a bit. Create space so that the very best of what you have to offer can thrive, flourish and truly shine.
To me, that means taking yourself out of a situation where you're feeling beaten down by things day after day.
How does this sound? Definitely get a job before leaving the current situation, but it does *not* have to be THE job right this second. It can be a bridge job or a "day job" so to speak. And like I said - you just never know, sometimes these things have a way of working out rather well, just like it has for banker/theatre guy in my family. Don't stress about having the perfect resume and applying for the perfect job(s) while still in the midst of a bad situation. Get something, for sure - but don't put so much pressure on yourself to get the next career-type job before allowing yourself to leave your current situation. That could take months. It'd be a lot nicer to be out of there, working, but maybe not in the ideal career, while continuing to look.
Just a thought.