I hate horror and mystery movies. (Good sentence)

I usually like almost kinds of movies but I cannot watch horror movies and mystery movies.

-> I usually like almost all kinds of movies but I cannot watch horror movies and mystery movies. (Add ALL after almost for it shows diversity.)

The reason I cannot watch horror movies is that it helps nothing for my life.

-> The reason why I cannot watch horror movies is that it helps nothing in my life. (Add WHY for you're giving a reason, also use IN as your preposition.)

the scene from a Horror movie is so gruesome and nauseous. so, if I watch horror movies, I can’t get the images out of my mind.

-> The scene from a horror movie is so gruesome and nauseous so if I watch horror movies, I can’t get the images out of my mind. (Take note of the words that you need to capitalized.  Also, remove the PERIOD and COMMA before and after the word SO.)

Also, I dislike mystery movies. because I don’t want to use my brains for watch movies.

-> Also, I dislike mystery movies because I don’t want to use my brains in watching movies. (Remove PERIOD after MOVIES, you only have one brain so remove S and take note of your verb tense.)

Anyway I don’t remember when I watched horror and mystery movies and I don’t want to watch these movies. (Goode sentence, just remove PERIOD before the word AND.)