How do you become stupid?

I believe you enjoy life more if you can be more unintelligent. Currently, i have dropped plenty of fiction novels since a single act makes my head want to scream that it's wrong and give me a significantly worse experience even though every thing else is good. My unhappiness spreads to real life too where i have become less forgiving of people that do pretty obviously wrong things but for other's perspective it was actually quite understandable