Advice needed - mid-career in-house job switch

Late 30s, 12+ years experience, currently in-house in fintech/financial services. Spent the bulk of my career in-house and never wanted to go back to a firm. Joined my current employer ~5 years ago at TC of about $200k, worked my way up to TC of $300k. Org recently stripped my team down from 3 to 1 senior lawyers (me), deleted half of support staff, and put me in charge of the team. Hate it, constantly stressed, 80% of work coming my way I know little to nothing about about or have nobody to assign to so I eat it myself, understaffed and nobody senior enough to share the load. Have some unvested RSUs coming into the money and them I’m out.

The dilemma - have an offer from a large FI, opportunity to join a team as senior counsel in an area I know well. Bigger/properly resourced team, experienced leadership, higher profile work but focused in an area I can manage. No direct reports. HUGE comp hit, i’d be going back down to ~$200k, basically erasing 5 years of comp gains. Seems like this is the only way to get into a larger FI but the comp drop is excruciating. Partner is a high earner (SWE, $400k) but live in VHCOL, two kids, million dollar mortgage so it goes fast.

Would love some perspectives on this. Tempted to wait it out and see if a higher paying opportunity comes along, but waking up every morning hating getting out of bed is dragging on me and wonder if this is the price to pay to get back to a more stable situation.