I have a friend who's been weight lifting with me for years now and he looks better than me. I wish I had his genetics!
Oh, I totally understand.  It's frustrating when you feel like you're putting in the same effort (or more!) and it works better for other people.  
It sure is frustrating, but I can't say I haven't made great progress myself. But his progress is insane!
Well, it's good that at least you're making progress!  It would be crazy frustrating if you weren't.  Congrats on your hard work paying off. 