Why do these threads keep popping up? "Im sad about loot, and im gonna quit and play this other game instead"
WELP, first there is NO ONE here who can help you. Anything anyone here can say: Play more, alot more = More legendaries. But perhaps you do not have time, so... cross your fingers and just enjoy the ride.
And 2, stop playing the game. Dont tell us, because frankly - no one here cares dude, at all. Sure, might feel bad for ya but, thats it, it doesnt affect anyone elses gameplay that you dont play.
Its not like there's some Blizzard employe reading this "Oh, well.. I better boost their legendary drop rate so they can enjoy our game".
Sorry to say it. But thats the way the cookie crumbles.
Edit: Also, I wanted to add.. that RNG, its the name of the game. It isnt Diablo 3. Its RNG 3. You cant expect two people to get the same or even similar amount of drops. Impossible. Much like there are people out there going "Hurr durr im paragon 243 and I havent even seen The Furnace, The Witching Hour or a Wand of Woh!".
And keep playing. Thats the only way you're gonna get more legendaries - atleast you both play Dex classes so you can share some legendaries.