Well electromagnetic certainly can cause problems, the real quesiton is how much of it do you need to get to have a problem with it.
Obviously radiowaves have been floating around in abundance since the 1920s. Add to that TV from the late 40s and now cell phones etc.
That’s a lot of waves floating around us. But do the occur in big enough doses to do you harm?
I would think that if it did you would see a lot more problems. And since the problems reported are somewhat common it’s hard to say with proof.
The only way to do this would be to test each person in a double blind study.
Of course if the person failed he/she would simply claim, there wasn’t enough exposure in the test to cause him/her issues.
I can tell you I often get a headache when I’m around cellphones. I can also tell you it ain’t the cell phone but the obnoxious person screaming into it that’s causing my headache 
If you’re exposed to huge amounts of radio/TV waves that IS a problem. TV/radio staton transmitters have clearly marked warnings. But once they broadcast radio/TV waves quickly spread out and there’s a huge difference between standing directly next to a TV station transmitter and receiving TV signals in you home
A similar example is cyanide. Cyanide is obviously very dangerous, but cyanide is found in apple seeds and apricot pits (OK not exactly but it’s close enough)
I had a brother who would eat entire apples, seeds, skin and all. Same for peaches and apricots. But he was just fine. The levels of the cyanide was never enough, at one time, to cause him damage, even after years and years.
So that’s the real question. Is electromagnetic radition, which is bad in huge doses bad over small doses dealt out over long periods of time? The two don’t always go hand in hand, as seen with the apple/apricot analogy