Disproportional (adjective)

1. Not being in proportion or in balance.
2. Being out of proportion with something else.

Origin:

From dis- + proportional.

Examples:

1. The punishment was disproportional to the crime.
2. The response was disproportional to the situation.
3. The investment was disproportional to the potential returns.
4. The expenses were disproportional to the budget.
5. The workload was disproportional to the number of employees.