I had the same experience. Though I tried multiple times with different methods, I have never benefited from meditation, or I never felt so, contrary to most studies. Maybe we are in the <0.05 population?
The biggest problem around meditation is that most are not able to clearly express what meditation is really doing with you.
Second, it's not about 'not thinking'. It's about being aware of your thoughts, as if watching them from a distance.
Third, you can't not benefit from taking some to sit and quiet your mind. That's as absurd as saying you don't benefit from sleep or rest.
How do you know this?
It was like ibuprofen for my suffering mind. Not that it helped immediately - but after a prolonged practice I noticed that suddenly my mind was not in psychic pain and I could just take the situation at hand without unnecessary added stress.
So, I suppose the perceived results might depend on the life situation at hand (ambient stress factors, so to speak).