Missleo,
You say the job is stressful, that you work 65-70 hours/week, and don't see yourself doing this for a long time. It's your first job, and your main goal is to get out... in fact, to reach FI so you can RE.
There are jobs out there related to accounting with less stressful hours, but takes a combination of effort, luck, time, job skill and job search skill to find them. You're going to have to make an effort to get to FIRE. I suspect you should go ahead and make the effort to pass the CPA, and to get through one more busy season, and get the 2 years at the big firm that are de rigeur for "I'm smart and I'm not a quitter."
Benefits:
1. Once you do this, nothing will be tougher. You can do it. You'll be stronger, your credentials will be stronger.
2. Our society continues allotting big benefits to "winners" (CPAs, people with 2 years at the Big 4) while increasing the penalties and reducing the meager slim pickings granted to lesser mortals. One more year of diligence will put you on the privileged side for the 10-15 years to FIRE... skip it and you may face 20-25 years to FIRE, based on the same effort per year during years 2 through 10. The investment is worth it. Not pleasant, just a high return on your time. Remember that other jobs may suck too, why work them for 20 years when you can be done in 10?
(I'll be honest. I think it's sort of close. But there's something about facing a strong challenge instead of running away that is very empowering. I think you'll be better off overall by doing the next year full force.)
3. These things compound. Combine the better privilege from a strong resume, plus the toughness to hang in there, you can achieve your 10 years. Without that combo, you could end up in limbo forever.
4. I'm probably your dad's age, I avoided tough stuff when young, I learned how long it can take if you abandon your opportunities. Hint: I'm not FI yet. Let me be your Ghost of Christmas Future.
5. "Stoicism" and "Position of strength"- look up the posts. I take them broadly to mean that minor discomfort is extremely powerful in building your life. View the next year as the hardest investment you'll ever make.
There is hope besides just sucking it up, of course. Work seriously at finding other work! Read What Color Is Your Parachute and take charge of your job search/career development. You can have a lot of impact on how much or little you'll enjoy working the next 10+ years, not just how fast you can make enough money to escape. Plus, the wise and serious job search may pay more per hour than anything you do on the job.
It's still probably worth one more year of effort and self discipline for now on the CPA/ stick it out side. In any case, best of luck.