I've been trying to get out of elo hell (Literally last 4 games have had a troll who intentionally feeds) but I've no lock. Currently sitting at 660 elo and I was wondering if Nasus would be a good option.

He requires a hell of a lot of farming but very easily dominates the game even if you lose your lane. Just a question, sorry I'm a noob so please don't be mean

If you're at 600 Elo then you're depending on a lot of things. Your team may not have a jungler. Duo top Nasus is not fun because you really want ALL the farm. You may be 2v1ing, which means you need to know how to farm under tower (pretty easy with Nasus).

Farmed Nasus is a monster. Tanky and huge damage. Perhaps a good option for solo carrying.

He becomes a hyper carry, of course hes ok in solo q

Id pick something with a better early game and just stomp

What Ryuzaki said - sure Nasus becomes a hypercarry if you can farm for the entire game, but realistically (since you're in such low ELO) the game's already ended before then.

At 600 elo you could probably win every games even with an AD heimer, especially if you're dat 5830 elo player that is in elo hell because of bad team mates