◇ Could this help me?
Yes, with the selection done deliberately rather than installing the whole list. Skills that carry real design knowledge are one of the more effective fixes for generated interfaces, and the two most worth looking at first are the provider's own frontend design skill and the one that extracts a design system from a reference site, since both change the output substantially. Do not install ten skills at once: each one is instruction text that shapes what the assistant does, they can conflict with each other, and a crowded skill set makes it hard to tell which one caused a result. Add them one at a time from sources you have checked. This is a general practice.
I want to improve how this assistant handles design work. List the design-related skills currently available to me, and for each tell me who publishes it, what it actually instructs you to do, and what it would change about your output. Recommend the two that would make the biggest difference for the kind of interface I am building, explain why those two, and flag any that would conflict with each other or with the design rules already in my project instructions. Do not install anything.