We'd need to see your profile to give you a decent answer.
Without seeing it, though, I'll bet you a dollar the problem is your photos. Online is all about the photos. It's superficial. The writing on your "about me" section is generally secondary.
If you'd like a real assessment post a cap of your profile up, with pics. Don't want it public? You can PM it to me if you'd prefer.
I'd also encourage you to read this thread:
online-game-isn-t-that-bad-vt186710.html
Dragula is solid with online and Tinder, IMO and you can probably take some pointers.