So, do you want to retire early or pursue your Finance dreams? You could easily do both, in sequence. Grind it out where you are, FIRE and then start out again in pursuit of your dream. I'd think the confidence of being FIRE once would benefit you in your pursuit of your new/original dream.
...
A little more self-examination is in order.
Hmmm…
It’s sounds partially like you worked hard and achieved your financial goals but it wasn’t as rewarding at the end as you’d hoped. Congratulations on hitting your financial goal! You’re in great shape (better than me, and I’m alot older) at a young age, some amount of deflation or let down after achieving a goal is natural.
I would think your frustration with your job would require either:
Changing your job situation (new job in same field or new career in new field or regular time off to better endure job. As fitting with the website and posts like Diane's, enduring the job long enough, while budgeting and looking towards an endpoint, to achieve FI and pursuing finance, or hobbies or giving back)
Or
Changing your perspective on your job (finding fulfillment outside of the job, changing how your think about or respond to job, not expecting to find fulfillment in it or it to be something you love. Any job might not make you happy if the being ‘afraid of the world’ or depression is strong)
On one hand you have a very good income, affording comfort and stability that most would be lucky to have, but thanks to hedonic adaptation, we get used to. Whether existential crisis or Buddhist notion of Dukkha (thinks are always off or not in balance, low grade suffering) life is difficult and we always expect it be easier/attachment. Trying to start each morning with gratitude has helped me lately. Reminding myself that at previous jobs I wasn’t always treated well and made 50% of the money helps me overlook the occasional BS at current gig. ‘Working to Live’ and looking at what the job gives you freedom to do like raise a family or travel or retire soon, rather than ‘Living to Work’, expecting work to be fulfilling. What are good aspects of your job and what does your salary allow you to do?
The fact the job requires no commute or in person interaction maybe part of the issue and leading you to feel isolated, maybe a situation with more in person interaction would work better? Is working out of the home causing agoraphobia or something else triggering fears about the world?
Maybe it isn’t the job, you were forced to cut real estate costs, would you want to move somewhere else? Feeling afraid of the world doesn’t sound good, as other posters have said, that limits you from enjoying your time not at work. Are you scared to go outside or that negative things will happen? Treating anxiety, depression, quarter-life crisis, existential issues with a therapist might help. Exercise and fixing sleep, if issues might help. Examining self-talk or finding meaning in other areas of life might help. Mindfulness might help.
Since you're searching for direction and change, try these two things for one month.
1) Other than what is necessary for your job, no screen time. No TV, no blogs or podcasts, no aimless internet surfing. Talk to your wife, see your friends, go for a drive, go outside. Take in a live performance, lecture, sporting event, art exhibit. Learn something new (either DIY or go to a class.) Do some 21-day fitness challenge or read through a "top 50 books" list. Take on a home improvement project. See how you feel when none of your time is spent passively consuming screen-delivered entertainment.
2) No more complaining about work.
...
Gratitude and appreciation for the good aspects of your job/co-workers can foster more feelings of satisfaction.
I don't have a roadmap for you, but try those two things and see if the world looks/feels a bit different after a month.
Finding hobbies, start Swimming, Dancing, Boxing, is it your job stopping your from pursuing these? Spending time chasing your passions might help. Vacation or balancing work and play might help. How are your relationships? Taking classes or training for another career might help. Focusing on FIRE or a timeline for transition to something else might help. Sorry for the meandering, but it is hard to know what is going on in your situation beyond the dissatisfaction. Or maybe the job is really a bad fit and you need to look at making a change. The fact you are feeling so strongly miserable is a good thing, this is forcing you to make some kind of change in your life!
Good luck, and good job. Again, no matter what you need to change, even if you quit tomorrow you are in much better financial shape than many people are at a young age! Maybe you will quit and be in a new career in 5 years, or wander for a year, your still young.