Crudity

His speech was full of crudity and lacked refinement.

The crudity of the model airplane's design made it difficult to fly.

The lack of research in the student's paper resulted in a crudity of content.

The customer complained about the crudity of the design of the product.

The crudity of his jokes offended many people.

The cake was a crudity creation, with lumps of frosting and uneven layers.