Wireless Sensor Networks (WSNs) have widespread applications in fields such as health care, environment monitoring, and structural health monitoring. Sensor nodes (SN) can only run a certain number of rounds before their batteries run out, energy efficiency is particularly important in these applications. This paper compares six popular WSN routing protocols—LEACH, LEACH-C, LEACH-E, DEEC, DDEEC, and EESAA. The MATLAB simulation compares throughput, SN residual energy, and total energy dissipation over 200 rounds. The findings demonstrate the high throughput and energy efficiency of EESAA and LEACH-E. However, applications need SN lifetime extensions and efficient data transport. DEEC and LEACH-C provide balanced energy consumption, positioning deployment as a contender for general-purpose applications with moderate energy requirements. However, DDEEC requires optimization since it has a lower throughput and dissipates the highest amount of energy. This paper makes a significant contribution by providing a comprehensive comparison of various protocols, emphasizing specific metrics and insights that could aid in selecting the optimal routing protocol for a specific application. Also, by exposing the performance trade-offs connected to each protocol and offering potential avenues for more hybrid techniques that enhance energy management and thereby lengthen network lifetimes in WSNs, the results significantly advance the discipline.