I can name you like 20+ characters in Naruto that were S tier power wise (and stronger than Danzo) that used only 1-2 jutsu or entire kit was based around 1 Kekkei. That's how this show was.

One could say that with exception of Madara, Kakashi, Sasuke AND Naruto ninjas that used a lot of jutsus were weak in comparison to those that used 1-2.

Danzo instead of creating completly useless and weak wind blade jutsus should focus around increasing his sharingan abilities (like Kakashi) and probably movement speed increase via wind style and strong taijutsu (he has hashi cells after all) cuz my dude can't dodge slow asf 4 Shurikens from Sasuke and wastes Izanagi on that Legit 1 tomoe Sarada would be able to dodge that thanks to sharingan ability but that clown can't even master something basic as that.

Not to mention that actually Naruto has by far more jutsus in his arsenal that all are 10times stronger than what Danzo did. You can say "yeah 10 rasengans cool" and I will respond "yeah Danzo amazing wind style, just applying wind to different weapon types"

Naruto is able to infuse wind chakra too btw but what do you think he should do. Throw pathetic wind infused shuriken or actual high end 2nd strongest in the world wind style jutsu Rasen - Shuriken [my top1 is Tornado from that sasuke gaiden episode guy - fuushin or something]