Saying all TV shows and radio shows are 'Satanic' is rather... generalizing. You'll find that often, the remarks of sexual content are purely for humor. And humor, mind you, brings MOST demographics joy. Saying, "God is the only joy you need," is ABSOLUTELY true, but don't forget that Christians aren't the only people watching TV. Bear in mind that just because we have God on our side, does not mean we have the right to control the content of TV for all humanity. That's domination based on theology, and I personally hate it. If you don't like the content of something, find something that has content you enjoy. There are several worship channels, and ignoring them to rant about shows you don't particularly enjoy won't bring ANYONE joy, no matter if it's from God or from entertainment. In the end, 'evil' and 'good' cannot be related to television, unless they broadcast nothing but Satanic rituals with intention of converting people to those ends, since 'evil' and 'good' are subjective terms, while television is an 'objective' existence.
When you become an adult (and when I become an adult), you'll find that sexual humor is actually funny to you. The more you try to scoff and make rude remarks about things that you don't truly know about, the less capable you are of connecting with people who do enjoy those kinds of things. And how can you build relationships, if you turn everyone away because you don't like certain things they do? Empathy, Compassion, Sympathy. These traits determine your ability to understand other humans. Don't let your beliefs that 'TV is evil' get in the way of such wonderful God-given affectionate feelings as these.