This could actually be a pretty neat villain.

He wouldn't just have his minions, but be really good at using his threads to attack people and ensnare them. Think of a mixture of Walter from Hellsing and Rachnera from Monster Musume. (Or any similar characters, really.)

He'll have his needles for close-range stabbings and projectiles.

Every now and then, he'll just stand idle and twirl his needles between his fingers or make shapes out of yarn for fun.

"Alex is a stupid knitter"

I'm sorry, I couldn't resist.

Anyhow, while OP tries too hard to make a big deal out of something that isn't (being a boy and knowing how to knit), I was pretty amused by the direction this went.