1. excessively simple or simplified; failing to account for complexity, nuance, or important details
Usage: often used critically to describe explanations, arguments, or analyses that lack sufficient depth

Examples

• The article's oversimplistic view of climate change ignored decades of scientific research.
• His oversimplistic explanation of the economic crisis missed the underlying structural problems.
• Critics argued that the documentary presented an oversimplistic narrative of historical events.
• The teacher warned students against making oversimplistic conclusions without examining all the evidence.
• That oversimplistic approach to solving poverty doesn't address systemic inequality.
• The politician's oversimplistic promises appealed to voters but lacked realistic detail.