Can you imagine being some poor kid pumped full of drugs, waking up to a strange noise, and what you see is a horse, but the wrong size, and it looks like a nurse is trying to feed it a piano?
Nobody likes you when you're depressed.
Plain and simple. We can talk all day about mental health and how important it is, but the moment you are depressed, people start to distance themselves. They see you as negative, a burden, and someone too heavy to handle.