To the author:
The art looks bright and vivid, but I can't quite disentangle it from the message. Hear me out, please.
If you are able to say all of this in person face-to-face to someone you think is depressed and follow-up with support, compassion and listening, I applaud you. I certainly hope that in real life you can, you did and you will. That's because right at this precise moment I happen to not be in a depressive episode and I'm capable of believing that sometimes people can actually be good and mean it.
...having said that, I also want to point out that during depression, when the world seems to be drained of positive things, when it seems especially cruel, when it seems that all wrongs suffered are deserved, this type of cartoon would be somewhere between infuriating and a sick joke to those who share this type of experience. There's no shortage of happy pastel-colored platitudes that the world directs at someone who is depressed. The problem with all those is that they are impersonal. They come across as unsupported claims or cynical lies. The _words_ say nice things, but there is no real person in the world actually backing them up. Without real personal warmth, compassion and support such words only hurt, as they seem to carry the message "Damn! You're even doing depression WRONG, how pathetic is that? See, you COULD feel better, so why AREN'T you?". An image is not a person. Even with an invitation to talk. Even if it had contact email attached. The delay in response and the uncertainty of getting one is more than enough in this case to become a huge barrier.
If you ever feel that you want to reach out to those who are depressed, consider reaching out to the rest of the people instead. Call to action to those who currently have the energy for action. Ask them (possibly through your art) to say the things you put in this art directly to someone they care about. If all it took was some sweet message to help those of us who are depressed, then depression would not even be a thing. Of course, nothing beats just helping someone you know personally. All that I said here implies that you desire to help more than just those you know.
I appreciate that you've put an invitation to come and talk with you. I hope you don't mind this feedback. I do not mean to imply either disrespect or to dismiss the good intent. If this cartoon made someone with depression feel better, good (depression isn't experienced the same exact way by all). My comment was triggered because the art and message hit on a very real pain point.