This response is going to be all over the place, but here it is anyway:
I don't love my career. It's fine, I like what I do, but I won't do it when I'm financially independent. And I still have about 12 years to go. I like the work okay, but I hate playing by other people's rules, having to be in the office and deal with corporate shit, and miss my kids. I go through periods where I hate my job and want to quit and take some time off, but ultimately (so far) I choose to keep my eyes on the prize (FIRE) and keep chugging along. And sometimes I even think that once I reach FI, I will so free that I will want to continue working for a bit, because most of the time I don't hate it.
But I know what you mean about the job and business world just not being right for you. I feel like I am aiding in corporate greed. It's tough. I sometimes need an attitude adjustment. I pretend I like the work more than I do, and it helps, and sometimes becomes the truth. I got pulled into a project that is outside of my scope of responsibilities. I was excited that VPs thought I was good enough to do it, but it was a hassle and I might have rather not done it. Upon a job well done and the positive feedback, I told them "thanks for the opportunity, I'm pleased to have been involved!" And it was maybe half true. Fake it till you make it (to FI, that is.)
Also, sometimes I consider a lower paying job in a different industry, but honestly my current company is really meeting my work desires right now. I work in corporate finance, but if I wanted a job that aligned more with my values and was willing to delay FI for it, I could do non-profit finance, or small biz consulting, etc.
So your spending is sub $20K per year with your mortgage? Even if taxes take out 25% of your gross, and your net is only $60K, you are looking at set-for-life financial independence in 10 years or so if you remain the same amount of mustachian and had 0 savings right now. I say pump it up by saving all of your future salary increases and further reducing spending. $200 for groceries for one person (you are one person, right?) can probably be improved upon. (We spend about $400/month for our family of 4). "Walking around money" is another easy target.
Use your time away from work to live the life you will live 24/7 in 10 years. Do you work excessively long hours? If so, try to scale back. Shift your mindset into the fact that your work is not your life and your journey to FI can be enjoyed. You don't need to suffer for the next 10 years. You've got 168 hours in a week, if you sleep 56 hours, work 40, commute (worst case scenario, I hope) 10, you've still got 62 hours to enjoy life. So enjoy it!