You are quite lucky to have a job in your chosen field Ajax. Not to say you didn't work for it of course.
My advice isn't to dream about escape, but instead try to furnish your prison cell

Not with material possessions, but with personal achievements.
9 to 5 can feel like a grind because along the way you aren't living your life. You're a slave to your routine.
It probably reads something like this: Wake up, go to work,
come home and unwind, dinner, sleep, repeat.It's very hard to do this but somewhere between work and rest you need to do something that you feel is
constructive.Yes it takes effort, which is sapped by your work during the day. Yes it might mean waking up earlier before work.
Yes there are only 24 hours in the day and you'll have to squeeze every last drop out of them.
If you work on something that you can progress toward over time, for just an hour a day, eventually
you will be
building something greater than yourselfThis is essential. Some have a hobby for restoring cars, others workout at the gym.
You need something to devote yourself to that isn't your job.
We can dream, but most of us won't have a job that satisfies us completely, that is we do it just for the money.
But as humans we still search for that sense of satisfaction.
Yeah I know I'm still lucky to have a job especially at my age, but yeah the highlight is what I'm getting sick off, been doing it for more than three decades.
I love my job and what I do, I get immense satisfaction out of it, there's nothing else I can imagine myself doing to tell you the truth, I'm grateful to be still working.
I do have hobbies and interest out side of work which keep me busy during the week, but if I could break that cycle I would, maybe go part time nah that is no longer an option.