I’ll go first: “You have to have children when you’re young,” told to me when I was in my late 20s, with no desire to ever have kids, and no means to support them, by someone divorced multiple times with at least one adult child who does not speak to them.
Also: Responding to “How do I deal with this problem?” questions with “Oh, don’t worry about it, it’s enough that you’re even thinking about it!”
I have a less impressive, but similar story to yours. I’d say it’s fine to work hard and do work that’s not your job, but the key is to follow through by demanding the proper acknowledgement and gratification for it. Like, doing it for free a couple of times to be nice is fine, but after that, the value you bring with this has to be properly acknowledged and compensated.
If you’ve been working hard and helping out, and an employer doesn’t gratify you to that value, the proper response is not to give up and pin it on hard work being the problem. That employer is being the problem. Try to change that if you can at all.