Has anyone done this? Taken this leap?
I've done this a couple times. The key indicator is when you start loathing coming to work before you even leave the house in the morning, and when that happens for long periods of time. Everyone hates their job sometimes, but if it's been going on for months & months with no end in sight (ex. a horrible project that will eventually be finished), then it's probably time for a change.
The problem is that living in a garbage situation screws with your head. It's the "hot, but crazy" dating scenario - you don't see the situation clearly when you're in the relationship. In this case, you're well-paid, you've been there for awhile, you know what you're doing, but some red flags have been going up. I stayed at a job for two years in this situation, and thankfully extracted myself from it & got into a much better situation at the time, but definitely regret staying as long as I did...it really affected my mental health quite a bit. I didn't sleep well, I felt terrible in the morning, I'd come home with knots in my shoulders, etc. It paid fantastically great at the time, but absolutely was not worth the stress & aggravation it caused me.
I did this with my previous car too, which was a lemon...I should have just eaten the depreciation & gotten rid of it, but I lived in a terrible situation for a long time. Looking back, it was pretty dumb to keep it as long as I did, when I had the power to change things, even though it would (perceived) hurt to change things. Thus, my main advice would be:
1.
Don't stay in terrible situations when you have the ability to change things. You don't know when you're going to die, or when your life situation is going to drastically change, so you should create a situation where you can learn & grow & enjoy things, not where you hate going into it every single day. Life is long, but also short, and the future is a question mark...you owe it to yourself to do better for yourself.
2.
Don't bail until you have an alternative situation locked in, i.e. a written job offer that meets you expectations or enough money to have time to look for a job for as long as you need (like 6 month's worth of finances available). Be smart about it. I've had friends bail out of their jobs out of frustration & then be out of work for six months or two years because they simply couldn't find a job. The money runs out, the stress goes up, bad habits are formed...don't make a rash decision, you know? Ensure that you have a financial buffer if you're going to bail without a
3.
Don't burn ANY bridges along the way - you never, ever,
ever know when you might need those contacts or resources in the future. Give them a nice, padded story about how you want to spend more time with your family or just need a change of pace or whatever, be professional & give them 2 weeks or however much time is required to find a replacement so you're not leaving them in a lurch (but definitely put a deadline on it, so you're not hanging around forever), and make your exit with them loving you, no matter how much you hate your job. You don't know if or when you're going to need them in the future, either as an emergency fall-back job or as a reference or whatever.
I had a professor in college tell us the story about how she was a power woman in the 70's, when there was a strong glass ceiling for women in the workplace. She ended up being highly successful, but had a particular boss who was extremely misogynistic at the time, and when she left, she wanted to tear him a new one, but decided to be a professional & bit her tongue. Fast-forward 35 years later & she ran into that boss at a party...he remembered her good work & offered her a 6-figure contracting job. Had she burned that bridge, that job offer never would have happened. You just never know what the future will hold, so my advice would be to leave on a high note, not leave them in a lurch, not tell them what jerks they are, etc.
Based on your OP, you should definitely change jobs. You don't want negativity to rule your life.