Sometimes you can just get stuck in a rut when employed. You know what you are going to earn & can lose motivation & interest. When I get a bit depressed, all you focus on are the negatives but the cloud does lift.
No1 thing for me is making sure you sleep well. After a fantastic nights sleep I wake up feeling you can take the world on.
If you do decide to try a different career, you can always come back to this job. You don’t just forget everything. I’m a heating engineer but I’ve got a really low attention threshold. If I’m doing the same(ish) thing every day I lose the Will to live. Luckily I’ve got a big customer base & sometimes take on larger projects (extensions, refurbs etc) sometimes I just do repairs & breakdowns for a couple of years till I’m bored of that.
Have you tried newbuild? I did that for 8 or 9 years & loved it at the time. Completely different challenges.
Someone mentioned train driver. My mate is a London Underground tube driver. He’s on about £60000, 10 weeks full paid holiday etc but....... you’ve got to be virtually brain dead to do it. I’ve been in the cab when he’s driving & was really interested... for about 10 minutes. **** me it’s boring but well paid.
Anyway, good luck whatever you decide.