How you gonna say that but Itachi and Kurenai used genjutsu in the same episode/chapter? Her genjutsu was just weak af compared to Itachi.
That's kind of the point. The comparison was painfully obvious that a Sharingan user's genjutsu trumps that of a genjutsu expert without a Sharingan.
Sharingan is indeed broken AF.
I mean you can literally rewrite death you loose an eye for it? No worries Hashi cells and replacement eyes were like going to get a flat tire changed. A minor inconvenience.
It literally has a genjutsu you cannot break unless you are related by blood? Really?
How is anyone suppose to honestly win when a single character can:
Create a flame that burns hotter than the surface of the sun and won't extinguish unless the caster dispels it.(Amateratsu)
Created a chakra avatar that provide superior protection and can take on armies and level mountains.(Susanoo)
Again a genjutsu that cannot be broken unless you are a blood relative.(Tsukuyomi)
Rewriting death.(Izanagi)
Rewriting someone's will to your desire (Kotoamatsukami)
Putting someone in an endless loop of a genjutsu until they accept their true selves (Iganami)
And how do you get all this? By being an emotional train wreck and stealing other people's eyes.
The only genjutsu that seemed even remotely on par was the frog genjutsu and maybe 2nd Mizukage 's Clam genjutsu but that's about it.