Dead-end career, what to do?

31m, been working in my current company for 6 years now here in MENA region (Im an expat). I don't see any light inside at the end of the tunnel.

Situation:

1. I was supposed to be promoted last year ("you deserve it but we don't have budget" kinda cr*p) I asked again this year at mid-year and the EIC again said let's try to push.
2. Why don't I just leave? Market is very bad, and my work is very niche. I see 1 opening from other companies like once a month, and yes I tried to apply but competition is fierce ("wasta" + too much talents, some raising the price to the bottom) - companies are also downgrading from Engineers to Technicians (less pay, more work type kinda deal).
3. Management tried saving $$$ by removing supervisorial roles, but issue is that check and balance is also removed, basically we are now slaves of Sales (they are good at sales but no experience in Ops). In the end more work is passed down, expectation is up and credit are stolen.
4. Freeze hiring, since there are budget constraints there is no relief with manpower, Im burnt out, just typing this makes my body hurts (my work is physical).

What Im doing:

1. Im trying to slow down work, not to get burnt out faster and save my body.
2. Applying to different countries / companies, but no luck atm.
3. Trying to reduce friction with management, I don't want to get fired but Im already mentally checked out. Im a vocal/frank engineer, when I see bullshit I call it out.

Anything else that I can do or advice that I should get?