Many people don’t know how to phrase what they want to say in a nice way. They usually mean well but come out insensitive. That being said, I hope this comes out ok.
I think that the mashal your family member was using is wrong but the message is correct. What she was saying is that at this point in your life you should learn to accept your problems for what they are and try to make the best of your situation. Everybody has their own sets of problems, some people went through the holocaust, others might have a stomach ache. But to each person, Hashem gives their own nisyonos for them to make the most of. Hashem doesn’t give you more than you can handle. Try to look at the bright side of life. Think of all the good that Hashem has given you and focus on that and let that affect your mood and the way you go about your day. Try thinking about all the random people in your life and what kinds of problems they have that you don’t and think about how they handle them and how it would be if you had those problems instead of your own. Also, you can think about the temporary problems that you have had over the course of your lifw and how hard they were and how good it is now that those are gone (something like a stomach ache, flu, etc). Imagine if these things were permanant and how that would make your life so much more unbearable than it is. Thank Hashem for the good that you have that those are not permanent and be happy with what you have.