Eryn — I’d say your feeling of relief when you found out you didn’t get the job is a pretty huge indicator that it wasn’t the right fit. Which is a bummer, I know, especially when you’ve put so much time and effort into an application. But it sounds like this application has put a spotlight on some of your non-negotiables, especially when it comes to a company’s expectations around how much time you devote to work (12-hour days is insane!). It’s been a helpful clarifying process, if nothing else!
It makes perfect sense that you want a little breather before you jump back into job searching/applying. There’s no need to burn yourself out on job searching by throwing yourself back in without a chance to pause, reflect, and catch your breath first. Give it some time, and come back when you’re ready!