I'm somewhat rare in the sense that I just quit vs lining up a new job first as we had a decent financial buffer, although if I'm being honest I suspect it was a case of jumping before being pushed as the stress was starting to impact my workplace relationships as well (especially with the CEO who was a chronic time-waster that loved pointless meetings).

I've said this elsewhere, but I think it's healthy to mix things up every few years - leaving this company ultimately worked out well for me as I quickly found a new opportunity that opened up doors I had never considered before. I don't know your exact circumstances, but if you have a significant other I think it's worth having a candid conversation with them and work out what the two of you need to live a balanced and fulfilled life. If the workplace stress is leaking into the rest of your life and you find work consuming an unreasonbale amount of your time, it's probably a good sign that it might be worth exploring other opportunities (in my experience, it's much harder to change an organization than it is to just move on). I realize this is different to the "roll-up-your-sleeves" advice elsewhere in this thread, but I view my career as a 40+ year marathon so I embrace the odd twist in the road every now and again.

And, don't forget to talk with HR at work if you don't think you'll get fired to see whether there is a way to reduce distractions. Many are more-than-willing to help- whether it's with buying some noise-cancelling earbuds, relocating you, letting you work from home, or another option. If it's a team member or more that is noisy or distracts you, mention that to your manager or HR.

You can go a long way helping yourself.