Have you ever walked through a gallery or a museum and heard someone make the comment? “I could do better.” or “My 5-year-old can make this.”
Art is a subjective experience. It isn’t always about technique. Technique could be flawless if the piece does not speak to the spectator. If they don’t understand it, it doesn’t mean that it is bad. The fact that someone came up with the idea and created it makes it unique.
If the person thinking he can do better had thought of it and had come up with the piece, then he would have made it. But he didn’t come up with the idea and he didn’t make it. That’s enough to conclude that he couldn’t make it.
So next time you see an art composition that does not speak to you, accept that it isn’t your style. You couldn’t make it. Appreciate the work and time that went into it and move on. My suggestion would be to try your hand at create an art piece that you can frame or display in your home. When you have done that, you can say you can do that too. Until then, enjoy the exhibit or move on.