I don't think this person understand how mental health works like at all.

First of all, BIG part of dealing with mental health is accepting what you have. When doctor tells you that you have depression, accepting that is a huge burden lifted from your shoulders. Because once you know that you have depression and accept that, many things in your life start making sense.

Instead of calling yourself lazy constantly and sinking into a deeper depression, you finally understand your own behavior. Some people will never recover from depression and only thing they can do is cope with it.

For those who do have depression or maybe think they might have depression, please seek professional help and let them help you out. Some random youtuber telling you to "git gud" at life won't help you at all.