Ah, the good old 'outleveled/outplayed'. No problem most of the time, unless they are dicks about it. You can learn A LOT from players like that. But to be fair, Lee is a pretty good counter against Akali, Riven does okay too. Now add a Garen to your list and you'll be all set
Oh, and when you hit level 30, you will still have these players face you with 20 runepages and a ton of experience. But there's also 1500W people who can't do a thing. MMR, you really need a working replacement.