Nothing is inherently bad. It depends on how we use it...
For example, alcohol is a good thing, but if we misuse it, then it harms us, body and soul.
Drugs are a good thing, but if we misuse them, then it harms us, both body and soul. (here I'm talking about medicine vs. drug abuse)
How about music? Does music ALWAYS need to be praising God? No, it doesn't. But does that mean we should listen to music promoting drug abuse, alcholism, violence, hatred, demonic activity, etc...? No, definitely not.
I listen to all kinds of rock music, and I play the electric guitar. But this doesn't mean I believe I can listen to any kind of rock music. For example, I don't listen to Disturbed.
Do I listen to songs like Highway to Hell and Hells Bells? Yes... But I don't believe those songs are harmful or satanic in any way.
I made a friend while in Greece, he was an Old Calendarist. (not the canonical kind)
He told me that rock (and other types) music was controlled and influenced by Jewish figures in the music industry, and that they made the artists put certain beats, melodies, etc... into the music so that they act as mind control, forcing the listeners to misuse drugs, become alcoholics, commit suicide, etc...
I'm sorry, but that just isn't true... If someone chooses to enter that sort of lifestyle, that is their own choice, it isn't the fault of the music. Certainly, if the music openly glorifies that lifestyle, it is to be detested, but I'll say that songs like Enter Sandman, Back in Black, One etc... don't glorify that kind of lifestyle.
I'm sorry you've gone through such hard times, and I'm not meaning to put down those lost to a horrible, destructive lifestyle, but lets put it this way... I have another friend who absolutely detests alcohol. She hates it so much because she lost a friend in a car accident to a drunk driver... Now, while I'm extremely sorry and sympathetic to her for losing a close friend in such a tragic way, that gives her no excuse to hate alcohol; by her logic, she might as well hate cars as well. (no, I'm not making fun)
You could also put it another way with the famous phrase, "guns don't kill people, people kill people". It is how we use our own instruments that determines whether our actions are good or bad, but the instruments themselves are not inherently evil or bad. (obviously unless they've been cursed or possessed, which is why we are taught to bless things before using, like food before we eat it)
Should rock music have a place in Christian music? No, it shouldn't. But does that mean we should avoid it at all costs? No, it doesn't.
Now granted, there are some people who have to avoid it, because it effects them in a negative way, think of alcoholics with alcohol... It isn't that the thing itself is bad, but that the person has a negative reaction to it. Does that mean others can't drink alcohol at any time just because that 1 person can't? No... But does that mean they should drink around that person? Certainly not...
No one is forcing anyone to listen to any kind of music. But we happen to like the same kinds of music and are discussing it in a Christian environment. I've done so many times, even with friends in church (obviously not during, usually during coffee hour, or in other social gatherings), why? because we are all Orthodox and understand a bit more about the spiritual life and guarding our souls.