I got in trouble for this recently so I'll try and be more gentle this time.
Depression isn't rational.
It's the hardest bridge to cross when you're there because you're kind of conditioned to rely on your perception of reality, but having depression means almost by definition that your perception of reality is completely wrong. You're not responding proportionately to real things, and if you were then that's not really depression.. everyone feels bad when things are genuinely bad, when a friend or relative dies it's okay to hit rock bottom over that, but depression is when you just hit rock bottom all the time, constantly convinced that your life is some torturous hell when actually the things which are bothering you are usually things most people would take a minute or two to process.
It's not selfish, because selfishness implies a choice, but it looks pretty selfish from the outside because it is incomprehensible. I mean, take this whole idea that it's completely unrealistic that other people are trying to help you. Is it? If you're depressed and reading this, ask yourself seriously - would you even notice if other people tried to help you? If someone did something which they thought was going out of their way to make you happy, would it even register, or would it simply be lost against the background of simply not being enough? Again, it's not rational to just assume that noone else is trying, in fact it is.. I dread to say it.. a little selfish. Why would you turn it back onto other people like that, why not just assume they're doing their best but that maybe their best is just never going to be good enough.
It's not simple, and that alone makes me skeptical that it will ever "work" in a game, indeed I haven't played this game, but at the same time I think we're far too easy to interpret "treating depression like the disease it is" as "slander". Depression isn't you. Don't internalize it. Don't defend the thing that makes your life miserable. Learn to hate and ignore it as much as you possibly can.