I've been in my current job for 8 years and I hate it now. I wake every morning with anxiety, constantly feel sick, spend the day on the brink of tears. But it's a 28 hour contract and gives a good life/work balance. Apart from I spend the time I'm not working, thinking about it and am never really present at weekends. It also has a company car and decent pay.
I've just been offered a job in my previous industry - 40 hours a week over 4 days for the same money I earn now as I'd be going on just as a team member. Means I can work my hours, go home and not have any stress. But the hours are only guaranteed until September so I'm hoping it's just a stop gap so I can find something else. It also means I miss bedtime 4 days a week and have to look at getting a car on finance. It feels risky but all I really want at the moment is to go to work, do my hours, come home and enjoy my time with the kids but am I being selfish with the cost of living increasing to take a risk?
YABU - stay in the job you're in
YANBU - take the risk and change jobs