you arms suck?
Keep arms day.
You want big legs, do legs.
You want a big chest, do chest.
You want big arms do arms. Give them the respect and time they need. I always have an arms day in my split.
Genetics are a big factor. I would look like a T-rex if I relied on push pull movements for arm development.
Some guys can do it and it works but I came from a similar situation as you. Genetically they don't keep up.
Last year...

8 months later

A year and half later
Biggest lesson I learned is treat them like legs, chest, and back.
Many guys think arms are all about squeezing and 500 reps.
Heavy, strict, and intense worked much better than bludgeoning them with super high amounts of reps.
Following the way Marcus trains inspired by Yates worked much better than CT Fletcher's super drop sets with 200 reps.