Hello Alex. Yes, boiling water is definitely too hot for green tea; it scorches the delicate leaves and results in a bitter, unpleasant taste.
Here are the recommended guidelines for steeping:
* Optimal temperature: 160°F to 180°F (71°C to 82°C).
* Steeping time: 1 to 3 minutes depending on the variety.
I hope this helps you enjoy a smoother cup during your busy weeknights.