John and Jane have been together for 6ish years. They bought a house together 2 years ago - no DC yet and not married.
John has had a tough time during the pandemic. He started a new job, had a falling out with the manager and left without a job to go to. He has also been diagnosed with a mental health condition during the pandemic and is now medicated but still working out the right dose etc.
Jane has worked throughout the pandemic. She has picked up John's share of the housework while everything has been going on and is now the sole breadwinner. She is also a carer for an elderly parent. She does however work from home pretty much permanently now.
John has now decided he does not see himself back in paid employment for at least another year so he can get himself straight, find new coping mechanisms and pursue a complete career change. He has savings to continue to pay his share for approx another 2 months. He has been paying towards the bills since he left employment (albeit, at a reduced rate) but these savings are now running out. Jane brings home a reasonable salary, enough to run the household without a contribution although things would be very tight.
Jane feels like she is carrying the load solo and sees this as evidence that what she assumed would be a short term thing is now becoming long term, unilaterally decided by John.
John is hurt by this and sees it as Jane being selfish and unsupportive. He honestly believes that a career change is necessary to protect his mental health and that he would be much better suited to this other career.
YABU - Jane is unreasonable
YANBU - John is unreasonable