I tend to say there are no bad developers...only devs with no motivation. It's not only you who have to do something. Do they like the product? Do they enjoy th

I tend to say there are no bad developers...only devs with no motivation. It's not only you who have to do something. Do they like the product? Do they enjoy the tools they/you use? Are they happy with the compensation? There are a lot of such questions you as a lead must figure out.