I agree. They makes me nauseous. The same kind of light nausea as car sickness.

I assume our brains are used to stuff which we dont notice conciously, and reject very mild errors. I've stared at the picture a bit now and the finger holding the baloon is weird. The out of place snowman feels weird. If you follow the background blur around it isnt at the same depth everywehere. Everything that reflects, has reflections that I cant see in the scene.

I dont feel good staring at it now so I had to stop.