I know a few teachers who have left the education system and privately tutor full time.
Their hours might not be the standard 9-5, but they generally work half the hours they did as a class teacher, have matched (and in one case significantly exceeded) their class teacher salary. There is more flexibility in how they teach, what they teach and they can genuinely meet the needs of the child.
In essence, they are teaching again.
Teaching has become more 'corporate' in its approach and expectations, which doesn't really fit the role especially when the education landscape has changed so significantly.
Unfortunately, the private tutor market has become somewhat saturated so I don't know how this will play out in the future but, then again, with more parents realising the education system isn't working for their children anymore, maybe the need will continue to increase.
it has become such a flex to quit the rat race, even if it makes you economically worse off
I'm in a fb group for teachers considering leaving the profession and there are teachers leaving the profession and taking £20-£40k pay cuts (with standard AL) to work in lower paid (sometimes min wage) roles. That says a lot about what people are prioritising.
It's not a 'flex' people just can't sustain it any longer. And many people are deciding that there are more important things in life than just making money.