I would say like this ,"I don’t know where he got the inspiration to create these stories but they’re definitely more interesting than the stories by American horror artists. However, during the uneventful history, I wanted to spare my eyes from this because it was nasty. "

I do not know where he got the inspiration to write these stories, but they are definitely more interesting than those of many american horror artists. However during the episode with a snail, I wanted to spare my eyes from this, because it was nasty.

The re-writes are fine except for two problems. „American horror artists“ is not an English expression. In fact, I wasn’t even sure what this referred to when you wrote it. We would say, „The author of American horror stories (or fiction)“. „Artists“ are painters of artwork, musicians, sculptors, those kinds of people. They are not writers or novelists. Second, the phrase „spare my eyes“ (in this context) is not an English idiom. You can spare your eyes from the glare of the sun, or the annoying flash of lights, but that’s about it. It’s very literal and pertains directly to the eyes. The proper expression is to „spare yourself from the sight“ of something horrific. For example, „I spared myself from the sight of the dead bodies lying on the road, after the terrible accident on the freeway.“ You didn’t spare your „eyes“ from that. That’s incorrect. By the way, I’m a native US English speaker.