If you don't have any dependents, you should quit. I could spit out a bunch of mundane platitudes to support that suggestion, like "In life, you never regret the things you do; you regret the things you don't do" or "You have to do what you're passionate about, or you'll never be happy," but you already know those things, everybody does, that's why they're called platitudes. You already know you should quit.
Ergo, your problem is motivation. Allow me: I'm going to keep calling you a pussy over and over again until you quit your job. Of course, you won't be able to hear me because I'm in my basement and you're not[1], but trust me, I'll be saying it. Pussypussypussy.
[1]Unless you're my black lab, in which case one of us needs to get the other to the hospital.