It's easy! Stop using ruby, switch to something good. Problem solved.
Or they could challenge an antirubyst that they can do that, and if they accomplish it, he would have to pay them the money for a good course on a new language and framework.
Strangely everybody is good at talking bad about Ruby, but would you take the risk to take the challenge? Otherwise you are just being incoherent at affirming Ruby is not good. And if you are, it means you can't be a good developer.