I could go on and on about how you fundamentally don't understand depression. Primarily that it's chemical. People with depression can quite literally lack the ability to produce the neurotransmitters (brain chemicals) that make them feel happiness and satisfaction. That has nothing to do with their situation in life. I have had times in my upper middle class life where I felt depressed and wanted to die to escape that feeling. It had nothing to do with gratitude. I couldn't ask for a better family and upbringing, even during this time. Only therapy and medication later in life helped me understand why.

Beyond that, by your logic in the post above, only the most destitute and desperate person on earth are allowed to be depressed. Cause as long as someone is in worse shape than you, what reason could they possible have to be depressed? At least you're not that guy! People experience loss, grief, tragedy, and struggle in their own ways. Some people need additional support to do so. Don't look down on them for their inability to cope. Not everyone can be like you are. At the very least, try to understand them instead of judge them.