Am I contractually obligated to give a shit after 9pm?

Today, I say no.

Hi, everyone!

I was struggling to write this rant (it's been a while since I've posted anything here) and was trying to put in enough details, but it was getting too long and heavy, so I thought I should try to keep it concise.
I get frequent headaches and feel physically and mentally exhausted all the time. Here's a little list of what I think lead to all this -
- Leading a team for the first time
- Not-so-great junior teammates
- Working with backend for the first time (doing it on top of my frontend work)
- Long working hours (unpaid overtime)
- Being underpaid (for all the things I now have to do)
So, I overworked myself (and still fell short in delivering my sprint goals) and after some time, considering all of the above things, I decided that the best course of action would be to give my notice and take a break for a month or two.

I talked to my boss about my struggles and my intention to leave, and after some discussion, he basically said that the difficult part of the project was over and things would get smoother from the next sprint, and so I should stay on and discuss on the matter again after the sprint. That sprint has passed now and I have still somewhat struggled to work each day with diminishing motivation.
I'm not sure if this is the right time to leave, and I just don't have enough energy to look for another job and go for interviews. So, I guess it is a bit of risk not having something lined up before I quit my (first ever) job, but I think I shouldn't have much difficulty finding something for myself.
At this moment, I don't know what to do, but maybe, if things continue to be dour, I may hand in my notice soon.

I currently don't work over 40 hours a week. When I come to work, everyone else is setup in the "war room," however my monitor and laptop are still at my desk (it's quieter with everyone out in the war room).

I have a good work/life balance, and I'm not alone. One of the other employees also refuses to work over 40 hours or on weekends. He has a PhD and teaches classes on the side. We both did at least participate in a Sunday all-day work session to get something to production.

What I'm worried about is resentment. I have taken zero vacation and was going to bank all my time, then in January take it all at once. I was going to ask for 3 weeks of unpaid on top of that so I could get a month and a half off to go south for the winter.

Even though my output has been really good while I've been working, I have a fear of resentment from others who do put in the extra time. We're all salary and none of them get paid overtime except for a one-time bonus for that Sunday I mentioned.

Soo since my last rant on my whole f'ed life last December, life has been going on for a while.

I've been married and FINALLY land on 2 part-time job ( both require on site but time is flexible), so I do both currently. But after 2 month or so, I start to have some problem with my health. I've been working 12 hrs a day, not mentioning average 2 hrs on college classes daily, and my body health starts to weaken overtime.

I've lost 7 kg of weight in a single month and another 5 in the second month. ( Granted I as m obese so this is quite a good thing).

While one of the work still under trial period for 3 months, but sign says that I would asked to stay longer. And I can't afford to stop working bcs I need both salaries to help my little family stays afloat.

Wish me luck

*Btw, oot Question, but had anyone here working with an SDK from Russian based Security video management system named Axxon? If yes I want ask some question regarding their SDKs...