I don’t think it’s referring to the particular problem so much as life getting better overall. You’ll have better days, better weeks, better months, you’ll get better at coping/resolving problems, you’ll find other things that make you happy to temper the problems, you’ll have more control over you life and that will make things better too, you’ll make better friends, find a better job, get better at asking for help.. etc etc etc.

The problem may not get better (though tbh chances are it will!) but life will get better as you plod along through it and when you look back you’ll see that you survived/the feelings passed/your life looks different (better!) now.