You're definitely not the only one feeling that way. I totally understand where you're coming from and I think this is something a lot of people are going to have to face over the next few years, one way or another.

What the ultimate solution will be, I don't know. But for now, I suspect the healthy approach is to redefine your standards for success. Stop measuring the value of making games (or software in general, or anything in general) in terms of what you produce, and start measuring it in terms of what you achieve and how well you express yourself creatively. All the best games might be made by AI, but your game will still be the one you make yourself, even if some of the work you do feels redundant. So focus on that part and make that your goal. No one can express your own personal creativity better than you can.

We already have examples of this in other domains. Chess AIs have been playing at a superhuman level for over 20 years, but people still get satisfaction out of learning and playing Chess. People still paint pictures even though we have cameras that can take perfect full-color photographs. You'll never run a kilometer faster than Usain Bolt, or grow a garden better than the Gardens of Versailles, or write a better novel than Lord of the Rings, but that doesn't mean there isn't something for you to personally achieve in running, gardening, or writing. Hopefully programming can be like that too.