Crudely

The speech was crudely written, lacking any rhetorical flourishes or nuanced arguments.

The detective crudely reconstructed the crime scene, without accounting for all the evidence.

The technician crudely repaired the machine, resulting in further damage.

The computer program was crudely coded, resulting in frequent crashes and errors.

The argument was crudely summarized, leaving out all the important details.

The accountant crudely calculated the taxes, resulting in incorrect amounts.