Crudely

He crudely estimated the weight of the package, resulting in shipping fees that were too low.

The crudely made furniture was unrefined and uncomfortable.

The writer crudely outlined the plot of their story.

The crudely written essay was full of grammatical errors.

The author crudely drafted the first few chapters of the book.

The crudely written novel was full of cliches and poor characterization.

The crudely constructed birdhouse fell apart in the wind.

The builder crudely cut the wood, resulting in uneven and unstable furniture.