Not one person in this world has a perfect life, regardless of the picture they may paint for the rest of the world. Everyone is going through something, and whether it be big or small, it is still something they have to work through and deal with. Just because someone has a bigger problem somewhere else in the world does not make my problem less valid.
The infamous "Someone Always Has it Worse Syndrome" comes from those with an insensitive outlook point-of-view on life. These types of people love to remind when you when they feel as though they or someone they know has a problem of more severity than you. Yes, when it comes to those struggling with hunger or homelessness while you may be sitting in your bedroom with an abundance of food, there are of course people out there barely surviving with the necessities of life. But when it comes to other things like homesickness or a feeling of stress and anxiety over certain situations, my current experiences are still very real to me and still completely and 100% valid. Being insensitive to someone's feelings and expressing these opinions about their struggles does not make them go away, it only adds to the weight they already have on their shoulders.
It has been and always will be important to remember what those around the world are going through, but never tell someone that they should not feel how they feel. Feelings and emotions are what makes us human, so do not be the person who takes that away from someone's personal problems. Certain things affect people in certain ways, so while it may not be a big deal to you it could be everything to someone else.
Remember that everyone is fighting their own battle, no matter what the magnitude of it may be. Do not make others feel less, instead be the support system they need and someone to lean on. Be sensitive to their feelings, yet be able to recognize when saying things like this is actually appropriate.