Would This Cause You To Get Resentful?

I was dating someone in a different state.
I decided to relocate to be with her.
Throughout a 3 year process, I put her on my cell plan and she was to pay the bill every other month. However, as her ex -husband was not making his child support payments and maintenance, I never saw a dime, even though i had to replace like 2 or 3 phones for water damage.
- I covered all the extra bills that she could not, rent, car payments, car insurance, food for the kids, etc…
- I traveled to see her and we she came to see me, or we went in vacation I would cover the bills, knowing she literally had no money.
Over the course of about the last year (we were together for about 3) I actively interviewed for a good career move for me (my one demand, the job had to be good for my career, I would not just take the first thing that came along) and in about 4 or 5 instances, was one of the top two candidates. By choice, either theirs or mine, I did not get any of these jobs.
At the meantime, my expendable cash ran out and I am know dealing with debt.
When i started addressing this…. “you need to figure out a way to cover all your bills”, “I want to cover you half of the phone bill every other month”, etc…
Her first response was to tell me I needed to get a money manager. Her second was to tell me, if she had that kind of debt, she would get a second job.
Granted, she has a 2 year old and a 6 year old and we did discuss and agree that we would try and have her stay at home until the youngest could go to kindergarten for both of their benefit. Additionally, my expectation was that it would not take me more than a year to find the right job.
But the bottom line is that I am somewhere in the ballpark of 30,000 into supporting a family that ins not mine and do not feel like she appreciates anything that I have done for her.
Would you be resentful or am i just being immature?