Well, since you are likely complaining because you lost this game, you should probably know that Irelia is one of Nasus's safer matchups. She's quite dependent on attack speed (so wither is very effective on her) and she's weak early game (so she can't really bully Nasus). Essentially, you got counterpicked.
In addition, looking at the match history it looks like both of you essentially freefarmed the lane without either of you dying until mid-game, which is not how you play against a Nasus.
Though, I'm kind of confused how you had issues against Nasus later in the game. You had a slow on most members of your team, which should have allowed you to kite him in teamfights if you played them correctly, though I supposed the fact that every lane on your team lost probably had something to do with it.
There are a lot of top laners who can crush Nasus when player correctly. This is by no means comprehensive, but it's a decent start:

For general advice, avoid pushing Nasus under his own tower, since that lets him farm safely. You want to get him away from the minions so you can freeze the wave and deny him CS. In addition, you want to call your jungler top to give you an early lead, which is pretty easy if you know how to make the wave push towards you and have some form of CC for the gank (most junglers won't give up a free kill).