Focus on yourself and double down. Work hard to improve your situation and strive to rise above it.
I struggle every day with a similar issue. I bought a house even though I pay child support. I work hard while they barely worry,about bills, and each month I must decide what won’t be paid.
The peace and solitude it brings our kids when they are here is worth the struggle now. In time things will level out; we just have to push through the present to enjoy easier times later.
I gave up a lot and worked hard to get here. I was where you are not long ago, had to reevaluate, barely scrape by, cut many lifestyle minimums, and live below my means for a while.
Hard times create strong men. Just keep on keeping on.