Step 1: Understand the context.
The sentence says the organization's growth was negatively affected by poor management decisions, so we need a word with a negative meaning.
Step 2: Eliminate incorrect options.
"Increased", "accelerated", and "facilitated" all suggest positive effects or promotion of growth, which contradicts the negative impact of poor management.
Step 3: Select the correct word.
"Hindered" means to make it difficult for something to develop or progress, perfectly matching the obstructive effect of poor management decisions on growth.
\[ \boxed{\text{hindered}} \]