You're absolutely right, most people I know who make absurd assumptions are actually miserable and usually are the ones with whatever feelings they're projecting on others. I knew a few depressed people in high school and college who always assumed I was depressed as well, although I did feel lonely a lot, I wasn't depressed to the point of constant misery and despair like they thought. I also have a very negative coworker that projects her negativity on others and assumes everyone else feels the same way about the job as she does. She assumes that I hate the job just as much as she does even though it's not true and its just her projecting her negativity on me and others, very self centered behavior and it stems from her own misery and that goes for anyone who acts that way.