As a Gold 4 Nasus Main I will respectfully inform you why he is not in need of a rework but at most a small shift in power from his w and e to place power elsewhere in his kit.
The others are not wrong. Nasus is essentially balanced around his 1 damaging ability, Q. and about 3 seasons ago a fed Nasus did = GG for your team. He was a raid boss hyper carry who could literally crush your whole team and walk away to destroy your base. This is not even remotely the case.
The damage creep has been unreal these last few years. The game is literally littered with champs who deal true damage, %health damage and have hard CC on top of it. Gnar, Fiora, Jax, Ekko, Kled are just a few who have a ton of mobility, free damage and hard CC. Nasus has one, albeit very strong slow, it is also single target. Even if he lands it on your ADC they probably have QSS or your team will peel him from ever getting that Q off on them and thus rendering all of his stacked damage completely useless. I have lost plenty of games where I have 500 -900 stacks because my team could not get me to high priority targets or the other team just simply kept me CC'd forever. It is far more oppressive to play again a mage with Rylai's while they slow you indefinitely and burst you while you never get any chance to counter. Nasus has to risk his body and soul to make things happen.
If you lost lane to him and he stacked like a god then engaging him 1v1 or 1v2 and sometimes even 1v3 is basically suicide. But if you force him to team fight early and don't feed him or generate enough pressure top with jungle interference then he will be essentially rendered useless or forced to play catch up and hope his team can turtle defend until he is relevant.
He has plenty of counter play. A very week and abusive early game. Farm suffocation, immobile and can be kited to death against a CC heavy comp. However in lower elo's like yours people do not coordinate to shut him down or play against his weakness's so I understand why you think he's frustrating. But the game is balanced around platinum level play and there only the most stalwart main prevail with him.
Personally he needs some health scaling on his ult and for that they could make wither a skill shot to make it more counter play oriented but then he needs to get some tenacity added into his kit somewhere so he can actually wade through the CC and deal his damage. He has the lowest HP pool of all juggernauts. Most of his core items have been nerfed, many of the juggernaut items don't help him b/c he needs mana and CDR before Health and the resolve tree offers him little defenses and thus he must use his runes to fill the gap to build health and Armor/MR.
So in truth, if anything, he borderline under powered and needs some small tweaks to bring him back into relevance. If you don't want to face him you can always ban or ask for him to be banned. Or better yet find a good Nasus main to duo with. That way you always have the odds "Stacked" in your favor. ;-)