Get a Language Tutor
If you have questions about the conjugation of бесполезность or Russian nouns in general, you can practice and get feedback from a professional tutor.
Я не могу отрицать твою бесполезность
I can't deny your uselessness
хотя его всегда топтали, создавать шедевры исскуства, сознавая их бесполезность и недолговечность.
To experience the feeling of human dignity, although we always trampled it beneath our feet. Create divine works of art, knowing full well their uselessness and fragility.