I think you're being a little harsh maybe? I agree big mood swings like this are a concern, but jobs do a lot to affect our happiness.
I'm likewise a little concerned about a partner who "wants a big house", but that's a highly condensed statement about what is no doubt a more nuanced situation.
I've jumped ship and had it be a really positive experience. Wouldn't be averse to it again, and I think that's mostly what this post is about: recognized that their career was important to them, dug deep and found a better job, now they're sharing excitement their about it.
It's also important to not get too much personal identification from a job (see Mike Rowe's thoughts on happy people working crappy jobs), and to not overwork, but whatever - they're making progress!
I've jumped ship and had it be a really positive experience. Wouldn't be averse to it again, and I think that's mostly what this post is about: recognized that their career was important to them, dug deep and found a better job, now they're sharing excitement their about it.
It's also important to not get too much personal identification from a job (see Mike Rowe's thoughts on happy people working crappy jobs), and to not overwork, but whatever - they're making progress!