You should really draw a line and tell the manager that if this continues that you will quit. Then it's up to them to either not micromanage you, split tasks to more people or make the deadlines more relaxed. If none of that can be done, you should 100% demand a salary increase. There's no reason not to, if they don't give it to you, you quit.

You have no obligations even if it feels like that. I've had the same exact situation so often and it always felt bad until I started drawing the line