Someone always has it worse than you
Personally I do not like it when someone says the above to me. There will always be someone worse off than you, but it does not make your suffering any less.
If the person who says the above to you is someone close, then realise that the person is just trying to make you feel better and this helps for some people. If you are one who does not like this being said to you. Say nothing to the sayer and move on knowing that it comes from a good place.