I'm not gonna comment on Depression/Anxiety/Mental Illness, I think @sarrowsmith10 @NickRowler and @Michelle have done a great job covering the topic.
Personally, I think sharing your success or failures with a mythical figure, be it a muse, or a belief in the notion of talent is just as damaging as taking it all for yourself.
Let's say I'm a beginner creator, I've just picked up a pencil for the first time and I'm going to make the best thing ever because that's what you do when you're a beginner. I'm talented, No one else can make what I'm about to make because I'm SPECIAL. I make the thing. It's not very good, and I realize that, and I take it to mean that I'm not talented at all and so I give up.
Let's say I'm a master of my craft and I just created a freakishly successful novel, It's because I was lucky and a muse decided to help me. I sit down to make the next thing, I take it easy because it's going to turn out fine no matter what I do. It turns out awful. The muse has left me, I decide to stop making things until I can feel the presense of the muse again. I never do. I never make another thing again.
Those are two extreemes, and they're very straw-man-ey, but I think you get the idea.
I will agree that placing all of the pressure of something being good or bad on yourself is too much, but I think fabricating reasons to distance yourself from that work isn't the way to go about solving the problem. Instead you should learn to enjoy the process of creating things, and learn to treat the end result of your work as completely disposable, and that's okay.
Focusing on the process instead of the end result gives you the freedom to experiment, it gives you permission to have fun. What people think about the result should be treated as a resource not a grade. People dont like X character? find out why, and try to experiment with it. Not because you need to top yourself but because you want to discover something new.
That's not to say that making things isn't hard and that it should be breezy all the time, but that's okay. Video Games are hard and people enjoy those, some games are designed to be as hard and unfair as they possibly can be, and people still have fun with those aswell.
TLDR. Making excuses for why you've done good or bad is bad, and you should instead enjoy the process of making the thing.