What do you mean by crappy? I've always found it very lovely and welcoming (though a touch small). The Julia community is also (in my experience) skewed towards scientific computing rather than software engineers which can definitely have an impact on things like "codebase quality" even in big important libraries. That's not a dig or insult – there are different priorities (privileging exploration, innovation, new ideas, and code that only needs to work until the paper you're writing is done rather than long term maintainablity is not a fundamentally wrong tradeoff to make).