Some people trivialize depression (often unintentionally) by dropping a platitude on a depressed person as if that is the one thing they needed to hear. While some of these thoughts have been helpful to some people (for example, some people find that praying is very helpful), the context in which they are often said mitigates any intended benefit to the hearer. Platitudes don’t cure depression.
„What’s your problem?“
Will you stop that constant whining?“
What makes you think that anyone cares?“
„Have you gotten tired yet of all this me-me-me stuff?“
„You just need to give yourself a kick in the rear“
„But it’s all in your mind“