Yes, "shitty perspective" doesn't help the way people treat you, but that's exactly why depression is so dangerous. It's this inward spiral of worsening and worsening conditions and no matter how "positive" you try to stay, there's no chance of swimming against that current. I mean, did we learn nothing from Robin Williams. Dude was nothing but positive on the outside, while inside he was obviously suffering horribly.
How about instead of blaming Jonathan (or anyone else suffering from depression), you acknowledge the real danger that depression presents. Shit, that's half the problem right there. There's such a large stigma surrounding depression that people are afraid to even try to open up never mind getting treatment. Your comment only proves those inner fears are true, which ironically makes it that much worse.
Lastly, just because someone co-signs your depression, doesn't mean they're feeding in to it or even that they're opinion will even have any affect on it worsening or improving. You know what does make it worse though, ignorant comments on the internet telling you it's all in your head and there's this "one simple hack" to eradicating it.