If it’s some kind of green, try 2 minutes, and you also have a second very easy marginal improvement: use colder water. Most greens should be brewed at 175F/80C. If you don’t have an adjustable-temperature tea kettle, you can get pretty close by pouring boiling water into a mug and then waiting 2-3 minutes.
You can also just dilute using tap water, which will usually be somewhere at 40-70F. Some ratios: https://gwern.net/review/tea#tap-water-dilution-of-boiling-water